Best TV revealing mistakes of all time

Assaulted Nuts - S2-E3

Revealing mistake: When Carrie phones Doug at IPS, Doug goes to press the button on the phone for the correct line, but doesn't press any and continues to talk to Carrie. (00:07:40)

A Demon

Seven Thirty-Seven - S2-E1

Revealing mistake: At the end of the episode when Tuco shows up at Walter's house in the backseat of Jesse's car, he tells Walter to get in. As they drive off, the shot pans out to show the street sign across from Walter's house. The sign says Piermont, which is the real name of the street. In the show, the Whites live on Negra Arroyo Lane. (00:48:00)

The One With Rachel's Date - S8-E5

Revealing mistake: In the scene in the coffee house, Phoebe is talking to Monica who is drinking a cup of coffee. Towards the end of the scene, the camera is on Phoebe who is smiling & laughing at Monica. In the right hand corner is a side view of 'Monica' however, it is not Courtney Cox in the scene, but a completely different actress. [Widescreen version only, although the "wrong" nose is visible in the original]. (00:06:20)

Rozwell - S2-E9

Revealing mistake: As the gang drives up to the space-ship diner, cars whizzing by in the background. When they are driving to the base there's also a clip of a Firetruck going down the highway in the distance.

Shoes, Hats, Pickle Jar Lids - S5-E9

Revealing mistake: When Charlie is in the Ferrari, his gets a call from Teddy. When Charlie brings the iPhone to his ear and talks to Teddy, you can see that the iPhone is upside down showing that no one actually called his phone.

The Lighthouse Raid - S1-E13

Revealing mistake: It is obvious a dummy was used for the scene of the lighthouse keeper falling to his death.

Taylors in Hollywood - S6-E8

Revealing mistake: While Andy, Aunt Bee, and Opie are at the Hollywood studio watching a scene being filmed, when Andy mistakenly stands up and interrupts the filming we can see the wall and shelves behind the director, and it should look familiar because it's the wall and shelves from Floyd's shop in Mayberry.

Super Grover

Throne for a Loss - S1-E4

Revealing mistake: After Rygel realizes that he can loosen the soil with the dumped gruel, it cuts to John and Aeryn as they approach the Tavlek camp, and when Aeryn tells John, "I am going to take out every last Tavlek. No survivors. No mercy. Now give me the oculars," John holds up the syringe (with Zhaan's sleep mist) that Aeryn had given him earlier, and we can see "DG-4" engraved on the side of the gun, revealing that the prop dept used the model DG-4 aluminum air blow dust gun to play the part of the syringe.

Super Grover

Body Language - S3-E12

Revealing mistake: After the two drivers from the traffic accident walk off holding hands, and Johnny tells Roy what happened with Barbara, while Roy explains body language to Johnny, we can see the white tape with "Kevin" inside Roy's helmet.

Super Grover

The Duel - S3-E4

Revealing mistake: Season 3, Episode 68, "The Duel": The prop wash from the helicopter filming the overhead scenes are evident as everything (dust, twigs, leaves, etc.) is being blown around.

The Night of the Bubbling Death - S3-E1

Revealing mistake: As West drags the body of a bad guy out of the scene, the supposedly unconscious man is holding his head up so as not to have his head dragged through the dirt. A truly unconscious person's head would flop back on to the ground.

The Treaty - S4-E7

Revealing mistake: Tom is talking on the phone in Ron's office. When he turns the phone at an angle the call home screen that has the end button, the speaker button, etc. turns to its side, which means it was a picture - he wasn't actually calling anyone. (00:02:25)

Hell House - S1-E17

Revealing mistake: Dean gets his phone and snaps a picture of Sam when he's asleep. You see his phone take the picture but the screen is then white, showing he didn't really take a picture.

Now - S6-E5

Revealing mistake: When Aaron is pinned down by the sewer zombie, the zombie actor's neck can be seen below his head mask.

Rage - S9-E4

Revealing mistake: When Laura picks up Baby Rose from Thomas Stark, the blanket is flipped up and you can see a plastic doll's leg, then when she goes into the bedroom, she has the real baby.

The Simpsons Christmas Special: Simpsons Roasting on an Open Fire - S1-E1

Revealing mistake: After Homer brings Santa's Little Helper home, Homer and Marge hug, and if you look behind them, the background is upside down. There is a picture hanging upside down, and there is a lamp which seems to be hanging from the ceiling. Then in the next shot, the background is normal. (00:21:40)

Hamster

The Barbarian Sublimation - S2-E3

Revealing mistake: When Sheldon gets the sword for Penny in the game, Penny walks out and you can see the laptop isn't switched on. (00:07:55)

A Demon

Gourmet Night (a.k.a. Gourmet's Paradise) - S1-E5

Revealing mistake: When the Colonel first meets Basil, the same shot is used twice of the Colonel twitching.

Anne - S3-E1

Revealing mistake: During the fight scene at the end when Buffy is fighting the demons you see her throw one of the demons off the platform. If you watch him fall you can see him land safely on a conveniently placed mat. (00:38:10)

Trash - S1-E14

Revealing mistake: When Simon gives Jayne an injection towards the end of the episode, you can see the fake needle retract into the syringe.