Revealing mistake: During Jack's dance scene, the old lady that he dances with spins away from him and knocks off a man's toupee. The actress was supposed to knock it off as she went by, but it's obvious that she misses and instead quickly reaches over to snatch it off his head instead.
Bio-Rhythms - S2-E19
Revealing mistake: In the multi-car collision, the ramp attached to the rear of the blue car to assist cars in flipping is visible. (00:04:10)
Logan's Run - S1-E1
Revealing mistake: Logan and Jessica commandeer a hover car that floats above the ground, but in shots of the car moving, wheels of the prop hover car are seen.
Episode 70 - S4-E1
Revealing mistake: Toward the end of the episode, Bert receives an envelope with pictures of him and Danny at a motel with some women. As they look at photos, Bert hands Danny some photos. Danny crosses left. Bert turns stack of photos over and says there is a note. He reads note and turns photos back over afterwards. The backs of the photos are blank. Danny crosses right to Bert holding photos. You can see on the back of Danny's photos the note Bert just read from the other side of the room.
Revealing mistake: In episode 2, when Kunta Kinte is on the slave ship 'Lord Ligonier', the slaves are trying to take over. During the fight, one of them is going up to a white man and if you look up in the sky you can see a trail from an airplane.