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)
Revealing mistake: When Victor is opening the padlock, sparks fly around in close ups. In the wide angle shots there are no sparks at all.
Revealing mistake: In the wizards versus werewolves special, it's painfully obvious Juliet is a stunt double when she fights and grows her wings.
Chuck Versus the Gravitron - S2-E8
Revealing mistake: In the scene where Ellie is testing her Thanksgiving turkey by giving Morgan a piece, when she throws it in the trash he says 'no no no Sarah.. what are you doing!', which is the actor's name (Sarah Lancaster), not her character's. Maybe edited in some versions. (00:09:40)
Revealing mistake: After Sam shoots Spencer with her blowgun, she lands on the ground after jumping from the ceiling. During this shot, you can easily see that it is a stunt double.
Revealing mistake: In the scene where the king and his entourage are walking through the crowd, someone in the crowd (right side) is wearing a watch on his left hand while applauding.
Revealing mistake: A recycled shot from an earlier episode causes Bob to enter the room wearing one costume and then suddenly be wearing another when he turns to begin his scene with Dresden and co. (00:11:50)
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)
Revealing mistake: When Copper is talking to Sam in the lobby, Cooper pulls out his phone to cancel his lunch date with Charlotte for that same day and his phone is time stamped as 7:35pm. (00:16:25)
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 the couple is breakfasting in Brooklyn their mugs are empty.
Revealing mistake: When mini is in the bath at the start of the episode you can see the bandeau she is wearing in the bath when she lays back down in the tub, probably to stop her being exposed.
Goodbye, Sarah Jane Smith: Part 2 - S4-E12
Revealing mistake: In the shot in Sarah Jane's attic right after Ruby is thrown into the sun, the group are talking in the attic and to the left of the screen, you can see that the blue screen used to create Mr Smith is visible.
Revealing mistake: When "Alice" drinks the potion and hands it to Nostalgia Critic who also then drinks it, the cap on the bottle is still on it. (00:01:20)
Episode One - S1-E1
Revealing mistake: When Gavin and Stacey meet, look at the people all around them in Leicester Square - many of them are stood watching the filming.
Revealing mistake: In the scene where Don Draper rips out his diary pages, while he is flipping them, the last two pages contain the exact same text.
Race to the Spaceship/Sandbox Surprise - S3-E5
Revealing mistake: In the sequence where Pig is making a pizza with strange toppings, an ant caries a large bucket of popcorn up the counter. It is flush on its back with no top when on the floor, and the popcorn is bulging out. The ant turns 90 degrees and walks up the counter, and the popcorn thus turns on its side in the air. Not one piece of popcorn falls out or even shifts, despite the pile now pointing out rather than up.
Revealing mistake: When Clara is filming her kids, we see her daughter operate the car. When she's supposed to have put the car in gear and have driven forward, you can see the scenery move in the background, showing that the car was stationary and the camera was just violently moved to the right to simulate the act of the car moving.