Velma loses her glasses and mistakes the Black Knight for Shaggy. When Shag arrives, she's suddenly wearing her glasses, but still thinks she was talking to him all along.

Hassle in the Castle

The Phantom is nearly always transparent, which makes sense, as he is usually a projected image. Except the shot where Scooby is about to fall on him. He ought to be solid in that scene, since Scooby lands on a flesh-and-blood human being.

Shaggy's ear turned brown for a moment.

A Clue for Scooby-Doo

Velma does an excellent imitation of Daphne.

When Shaggy sits on an underwater rock, his hair briefly changes from his trademark cut to a 'do suspiciously like Freddy's blond coif.

Freddy tries desperately to open the door of the sunken ship, but to no avail. He might have had better success if he didn't brace his feet on the door, thus effectively holding it closed.

Scooby fills his diving suit with oxygen and Shaggy punctures it in order to send Scooby careening at the diver. The only problem is, Scooby shoots off in the wrong direction, toward the puncture instead of away from it.

When the gang springs the trap on the diver, the bottle with soap attached to the hose vanishes.

When the diver is unmasked, Shaggy puts seaweed on the man's face and asks if it reminds anyone of the picture on Widow Cutler's wall. Freddy, Daphne, and Velma all shout, "Captain Cutler", even though Freddy and Daphne never even saw the picture.

Mine Your Own Business

When Scooby is reluctant to enter the abandoned hotel, Shaggy pushes him in, knocking the spots right off his back. Temporarily, anyway.

Shaggy tries to show off his burglary skills by opening the lobby safe, turning the dial while listening for the tumblers. Then, Scooby tries the handle and finds that it's open. However, turning the dial at random as Shaggy did would lock a combination safe, not unlock it. Either the lock was broken, in which case the combination the gang found in the wooden Indian would be worthless, or Shaggy is an expert safcracker!

At the end of the mystery, Freddy comments that old Hank is in jail. Did he really commit any crime? Is it against the law to dress up in a costume and scare people?

Decoy For a Dognapper

This appears to be the first time Shaggy ever tasted a Scooby Snack.

While discussing the safety of Bob Miller's Great Dane, Masters says not to worry, since Miller only walks the dog at night. Is this supposed to be a precaution?

To escape the bats, Shaggy runs through a door, leaving Velma behind. He meets Scooby dressed as an Indian, runs back through the door and closes it. On this side of the door, he sees--Scooby again! To return to Velma, Shag goes through the door a third time, which should be the exact opposite direction from her.

Why'd Scooby put on that Indian mask anyway?

"Good boy, Scooby," says Fred, "You found them and freed them all." Daphne found the dogs first and undoubtedly helped Scoob free them, but she doesn't get any credit.

Scooby gives his trademarked battle cry without moving his lips.

Scooby wears a red studded collar over his normal blue while in the crate, which turns to blue, then to blue with studs, then back to red again.

Scooby temporarily loses his spots in the scene where the garbage almost lands on him.

The tracking antenna on the roof of the Mystery Machine is gone, then returns.

What the Hex Going On

Much of the action takes place in either the estate where Sharon lives, or the abandoned old Weatherby mansion. Unfortunately, the backgrounds for the two are sometimes mixed up, unless Sharon's home is really full of cobwebs.

In this episode, Shaggy proves to be quite a good ventriloquist. Daphne must also be one, since her voice clearly comes from Velma's mouth several times.

Shaggy uses his ventriloquist skills to make it appear to a nearsighted lady that Scooby is a swami. So, why does Shaggy insist on joking around, saying that he sees his reflection in the crystal ball and that the customer will dance with a man who will whisper to her that she's standing on his foot? Is he trying to get Scoob in trouble?

After capturing the ghost and tying him to a chair, Freddy and Shaggy wipe the make-up off his face to reveal Uncle Stewart...complete with eyeglasses. Either his make-up job was so skillful that he was able to disguise the fact that he was wearing glasses, or the guys obligingly put them on the prisoner so we could recognize him.

Never Ape an Ape-Man

As part of the plan to capture the Ape Man, Velma stands by at a bank of switches to release a net. When Scooby fogs up her glasses, she pulls the wrong switch, the one in the center, and accidentally turns off the lights. Surprisingly, that is the very switch she had her hand on before Scooby came along. Looks like she can't blame Scooby; she would've goofed up anyway.

Why is a parrot on the set of the old mansion after everyone quit working on the movie? I hope someone remembered to feed it.

Shaggy is suddenly wearing a watch.

Foul Play at Funland

In this episode, we learn that Scooby doesn't like clams, perhaps the only food on earth he doesn't like.

The reflection of Scooby's dog tag in the funhouse mirror is not a reverse image, although it should be.

Scooby attempts to track the mysterious man by sniffing out his trail, until he learns that the robot has no scent. Great idea, Scooby. So, how come he never tries that trick with any of the other spooks the gang encounters? Because he'd get a whiff of them and instantly know that the ghost is really the farmer, or the nephew, or whoever, and that would be the end of that episode.

To escape the robot, Shaggy and Scooby jump from the moving car of a roller coaster into a car travelling in the opposite direction on another track, an incredibly dangerous stunt! Zoinks!

When the caretaker Mr. Jenkins tries to capture Charlie with a large electro-magnet, the device suddenly and mysteriously ceases to function. He soon discovers that a wire has been cut. Of course, he failed to see his sister Sarah cut the wire, even though it was only around six inches from his face.

The Backstage Rage

How does a lone puppeteer keep the poodle marionette working while he goes to pick up the violin case Scooby left on the sidewalk?

Shaggy finds a twenty dollar bill inside the theatre, which Velma later declares to be genuine. Did Shaggy ever return it?

Daphne's neck turns green, probably from wearing that cheap scarf.

Why does the puppeteer open Johnny the marionette's eye to peek at the gang? Surely he can't see through it.

When the villain's car moves slowly past Shaggy in the phone booth, spots on the celluloid move along with it, floating through the air.

A scenery wall falls, narrowly missing Shaggy, but it's gone when we see him from a different angle.

When the gang catches the puppeteer, he falls into a base drum that looks like it was already broken.

Bedlam in the Bigtop

No matter how many of Scooby's balloons the Ghost Clown pops, their number never diminishes.

A Gaggle of Galloping Ghosts

When the gang arrives at the castle and finds the drawbridge up, they decide to go home, until the Vampire, opening the drawbridge to scare them off, traps Daphne inside, thus forcing the kids to find a way inside. If the fool had just left the drawbridge closed, he could have gotten away with the jewels without any interference from our favorite teenage sleuths.

Freddy's collar turns white. Also, the back of his sweater has a peach-colored area on it, as if his skin is showing through.

Franken Castle was removed stone by stone and rebuilt in this country, with the furnishings intact. How did the workmen miss seeing the jewels sewn into the back of the tapestry? Maybe they thought they were rhinestones.

Another thought on the furnishings of Franken Castle: Shaggy and Scooby find such delicacies as Werewolf Snacks and Fried Moonbeams. Were these part of the castle's original furnishings? Do they sell such things in Transylvania? Or did Big Bob Oakley add them for effect? Three monsters running around wasn't spooky enough, so I'll really scare them off with my haunted pantry!

Scooby-Doo and a Mummy, Too

In the explanation of the mystery, it is revealed that Dr. Najib only dressed up as the Mummy after he had captured the Professor. Yet we see a very mummy-shaped shadow pass the Professor's door while the Professor is still at liberty. Could there be a second Mummy running around the place?

Velma says that Dr. Najib broke the window so he could enter the museum and steal the coin. However, the hole in the glass is clearly man-shaped. Did he hurl himself through it? Maybe that's why he wrapped himself in those bandages.

Which Witch Is Which

When the crooks are unmasked at the end of the episode, we learn that Zeke is the Zombie and Zeb is the Witch. Velma then explains how Zeke the Witch used smoke pellets to appear and disappear.

The footprints on the rug which show Velma that Daphne slid into a trap door are very peculiar. When observed from the room below, they slide to the side, not in the direction that Daphne must have fallen. Not to mention the fact that Daphne is shown standing on a bare floor, not on a rug at all.

The Spooky Space Kook

The gang finds several clues on the abandoned Air Force base having to do with machinery, namely a generator that is still warm from use, and fresh grease. We never learn what Henry Bascombe was using the tools and machines for.

The sheriff wears his badge on the left in his close-ups, and on the right side for far shots.

Go Away, Ghost Ship

As the pirate ship is about to strike the gang's boat, Freddy yells, "Paddle!" They might've escaped if Freddy helped paddle, instead of just standing there.

A Night of Fright Is No Delight

The front door of the mansion opens outward, not inward as most front doors do.

Freddy is shown wearing his pajamas, then in his street clothes, then in his pajamas again.

When he pushes drainpipe, the Phantom Shadow is transparent. How does he do that?

For that matter, how can a shadow have a glowing red mouth and eyes?

That's Snow Ghost

Foo Lun Chee has spent much of his life fleeing the ghost of the Yeti. When the mystery is solved, we learn that he had no connection with Greenway's smuggling operation. So, was he just crazy?

Mr. Greenway is one of the more dangerous criminals the gang encounters. While most of them are content merely to scare off intruders, this guy ties Velma to a buzzsaw, and then tries to blow her up with dynamite!

Nowhere to Hyde

In order to escape from an alligator, Shaggy runs right through the side of Dr. Jekyll's house, leaving a Shaggy-shaped hole in the wall...complete with floating pieces of wood to delineate the negative space in the crook of Shaggy's arms!

When Shaggy shows the suction cups he found, there are clearly four of them. But, when Scooby later uses them to demonstrate their wall-climbing capabilities, he has five.

Velma labels the spook as "the guy the newspapers are calling 'the Ghost of Hyde' ". So some reporter picked the name to sell papers. What a coincidence that he was really Dr. Jekyll in disguise.

Dr. Jekyll plants a host of false clues for the gang to find in order to implicate Helga the housemaid as the Ghost of Hyde. The one real clue is the suction cups which point to Jekyll as the ghost. Even though Shaggy finds the suction cups, Velma & the others still think Helga is guilty and are surprised to see Dr. Jekyll beneath the mask. Therefore, Jekyll's frame-up idea worked; only he didn't expect the kids to capture and unmask him.

Mystery Mask Mix-Up

Fong is quite the egomaniac. He has his zombie henchmen bowing before him in this episode's opening scene. Maybe he believes he really is Zen Tuo.

Scooby is such a good bicyclist that he passes a car while pedaling uphill!

Mr. Fong is the only oriental art dealer in all of Chinatown? If you can't find oriental art dealers in Chinatown, where can you find them?.

Another of the more dangerous villains of the series, Zen Tuo thinks nothing of blowing Shaggy to bits with fireworks.

Take a close look at the message which leads the gang to "The temple in the hills"; it is written in reverse so that it can only be read in a mirror--all but the second "the", which actually appears frontwards.

In an attempt to bluff Zen Tuo, Shaggy draws a line on the floor & dares the villain to step across, which he, of course, does without hesitation. Trouble is, when Zen Tuo steps across that very first line, there is already a second line on the floor behind him.

Jeepers, It's the Creeper

Mr. Carswell is shown standing behind a small end table; however, he is not visible between the table legs.

The door of the Mystery Machine is the wrong color for a moment.

We never learn if the hermit of the hills is really the Creeper, as Velma believes. If it is him, why the act?

The guard says he installed a hidden camera in the bank, but it's mounted on the wall in plain sight. Somehow, Carswell still didn't see it.

Scooby's neck turns blue when he pulls off the Creeper's mask.

See The Haunted Horseman of Hagglethorn Hall

Scooby's Night with a Frozen Fright

When the gang returns to Oceanland to retrieve Shaggy's fishing pole, they find the Arctic Room demolished and a shredded parka which Velma proclaims to be Prof. Wayne's. Unless his name was sewn into it, she would have no way of knowing it was his, since they left without actually seeing the professor wearing it.

Haunted House Hang-Up

Asa Shanks gives the gang directions to the highway by telling them to take the long route to the right and avoid the haunted mansion, hoping to keep them away from the hidden treasure. If he had simply said, "Turn right at the fork", they never would've found the Stillwell mansion in the first place.

The gang follows a set of footprints that mysteriously split into two paths, the right-foot marks going to the right and the left-foot marks going into the room on the left. When next we see the same tracks, however, they appear as normal footprints entering the room.

The rug that is seen when the Headless spectre climbs up the stairs disappears when he goes back down them.

Velma and Shaggy both remark on how cold and clammy the Headless Spectre's hands are, yet he appears to be wearing gloves.

The clue in the book is slightly different when Velma reads it than when we see the page.

The inside of the well looks much bigger when Scooby, Shaggy, and Velma are in it than it did when they simply looked in it.

A Tiki Scare Is No Fair

The witch doctor turns out to be John Simms, the man who brought the gang to Hawaii. If you were planning to cover up a crime by dressing as a ghost to scare people away, would you bring along a group of amateur sleuths whose hobby is solving mysteries?

Who's Afraid of the Big Bad Werewolf

What's a tiki mask doing in an abandoned mill?

Shaggy saws a hole in the floor so he and Scooby can escape the werewolf who's standing right behind them. They fall onto a bannister and slide down into the arms of...the werewolf! Boy, he's fast!

Why are the rubber hoses needed in the barrels when a simple hole would do to allow the smuggled sheep to breathe?

Freddy says, "Here comes Shaggy & Scooby's barrel." But all the barrels look exactly alike.

Shaggy cuts his shirt with scissors, but it soon fixes itself.

Don't Fool with a Phantom

Although Johnny Sands is tied to a chair, he manages to free one arm before Freddy unties him.

The Wax Phantom was originally an exhibit in the museum. Why? It's not a famous character, just a blobby wax thing a child could've made.

The Wax Phantom traps Freddy, Daphne, and Velma by dropping them through a trap door. Too bad it leads to the room where he hid the stolen money, enabling the gang to find it.

And why does a wax museum have a trapdoor in it, anyway?

The Wax Phantom is eventually revealed as Mr. Stevens, yet we previously saw both Stevens and Waxy in the same shot!

Gisby has some great special effects in his home: a ghost in a box, skulls rising from a kettle, glowing crystal ball, waving skeleton. Does he just like to scare people?

In the Topsy Turvy Room at the wax museum, Shaggy & Scooby become disoriented & climb into the chairs which are attached to the ceiling. They then try to eat a box of Scooby Snacks on the table. If it was attached to the upside-down table, how did Shaggy pick it up?

The back is filled with miscellaneous equipment, a ladder, lanterns, rope, etc.

Decoy For a Dognapper

The back contains a table and chairs, plus the walls are lined with computer equipment; there is a large antenna on the roof.

Haunted House Hang-Up

Instead of double doors on the back that open out, there is a door that lifts up, revealing the radiator.

Jeepers, It's the Creeper

There is a lighted vanity mirror mounted in the back.