Revealing mistake: While Rory and Lorelai are in the kitchen, in a few closeups of Rory we see the refrigerator and counter area with the microwave, etc. behind Rory, but when Lorelai is at the back door about to join Luke, part of the set beside the refrigerator is gone. (00:04:15)
A Very Marry Christmas - S8-E9
Revealing mistake: As the Hecks check out the neighborhood Christmas lights, the same house with the same decorations are seen through Sue's side of the car several times, showing the background scenes of the house and decorations were replayed.
Episode #1.1 - S1-E1
Revealing mistake: When Michael sets fire to Madge's magazine, you can see that the flame was not directly coming out of the lighter. The effect was added in during post-production. (00:05:15)
Mark Hamill - S4-E16
Revealing mistake: When Luke Skywalker is introducing his 'cousin' Mark Hamill at the end, you can tell it's a split screen by the fact that Luke looks right past him, even once he's on stage. (00:25:10)
Psy vs. Psy - S2-E3
Revealing mistake: Whenever you see Shawn and Gus outside it appears to be warm but if you look in the background people are wearing jackets and heavy coats, revealing that during filming it was winter and cold out.
Revealing mistake: When Fletcher and Godper are assigned to the work party and they get locked into the church, one of the prisoners, Melvin (the hippy) leans against one of the 'stone' pillars of the church, causing it to wobble.
Close Encounters of the Beans Kind - S3-E8
Revealing mistake: When Louis and Beans fall from the sky on the bike, if you look carefully, you will see that they're both dummies.
Revealing mistake: If you look at Les out of Les Alano's' drumming, several time throughout the whole show, you can see he is miming and his stick is not even close to the actual drum.
Revealing mistake: When Jerzei is coming through the door with an axe, you can see the door is paper thin to make it easier to get through. In fact you can see Alexei Sayle being very careful to only chip small bits away because a decent whack with the axe would smash the whole thing down.
Revealing mistake: The crane in the garden is behind the tree, but we see just the top of it - and under it is nothing.
Revealing mistake: When Zack and Cody are tied up by the secret spy, when Cody is texting Bailey "Help Me" with his toes, you can see that the Mobile has a black screen, and is turned off. And he was just hitting random buttons with his toes.
Revealing mistake: In the episode with Fast Eddie McClintock, there are two revealing mistakes in the scene where Fast Eddie jumps the roadblock. First, the ramp he jumps off of is visible in numerous shots before he shows up. Second, explosive charges can be seen in the wheel wells of the police cars before they run over the spike strips.
Man-Eater of Surrey Green - S4-E11
Revealing mistake: When Steed and Mrs Peel are fighting one another, the stunt doubles used bear absolutely no resemblance to the actors.
Revealing mistake: Near the end when Randy is driving away with Harry you can see that the steering wheel doesn't move when Randy turns it.
Meet My Master's Mother - S3-E9
Revealing mistake: The "ocean" behind Tony and his mother is a painted backdrop; the waves aren't moving. (00:20:10)
Revealing mistake: When the school bus is shown cruising around the corner on the way to the camping area, you can see that as it turns the corner is is virtually empty. (01:38:50)
Revealing mistake: At the point where someone gets a small bruise on the upper arm, the crew are all in a pile and thrashing about on the floor. There are 5 pairs of legs instead of 4. Arthur is in his pajamas, Zaphod is in orange trousers, Trillion is lying on top of Ford and Ford is too far away for them to be his legs. [The fifth pair of legs belong to the person playing zaphod's third arm - doesn't mean it's not a mistake, but that's where they come from.]
Revealing mistake: The actor that played Barney Miller, Hal Linden, was left handed and did everything left handed. However, they always put his gun on his right hip with the handle facing the right. A lefty cannot conveniently pull the gun this way.
Suggested correction: Hal Linden writes with his left hand, however he uses his right for many things. He ate with his right hand (in Graft), and in the episode where Fish thinks he needs to retire, Barney pulls his gun with his right hand.
Revealing mistake: When Stemple and Jason argue on the porch, an electric light bulb is very apparent in the lantern beside the door. (00:41:00)
Revealing mistake: In the final scene when Foggy is on the horse, it rears up when frightened by Foggy's bleeper, causing Clegg to jump out of the way. It's obvious that it is a stunt double playing Clegg, as he has a different hair style.