Helping Hands, Iron Fist - S1-E4
Revealing mistake: When Iron Man appears on the screen in the Hulkbuster armor, if you look at the background behind him, there is a closed door behind him to his right and a control panel directly behind him, which means he appeared from out of nowhere.
It's All Done with Mirrors - S1-E27
Revealing mistake: During Scott and Kelly's scuffle in the restaurant, the stunt men's faces are visible several times. (00:27:25)
Revealing mistake: When everyone is supposed to be frozen, the neighbor girl standing behind the car can be seen moving her hand onto the car. This happens as Monica says "I'm not afraid of you, Wanda." (00:24:25)
Return of the Fighting 69th - S1-E6
Revealing mistake: Before Roxanne Trent hits the box, it is possible to see that her hand is normal, not iron. (00:17:01)
Revealing mistake: During the fight against Juan Greco and his partner, Diego is replaced by a stunt double. (00:12:58)
Revealing mistake: When the monster uses its claw to swat Hayata away, under the superimposed claw you can see the abrupt disappearance of Hayata's shadow from one frame to the next. (00:19:30)
Revealing mistake: When Edward opens the gate to let Tracy in, we then see a shot of Tracy and you can see it is repeated footage of her from when she met Edward for the first time.
Where Is Chick Lorimer, Where Has She Gone? - S3-E13
Revealing mistake: Tod parks his car across the street, facing left. While standing in front of the house Ellen and Peter run to Peter's vehicle and drive off to the right. Tod goes back across the street and gets back in the Corvette. The image is then flipped to give the illusion that he is driving in the direction Ellen and Peter went. (00:21:00)
Mind Your Mummy Mommy, Mario - S1-E3
Revealing mistake: When some Paragoombas fall after hitting a wall, they disappear into thin air. (00:09:35)
Revealing mistake: When the channel 6 crew member is telling April they should go, his hand disappears for a frame.
Revealing mistake: When the assistant gets thrown into the wall by the brain controlled Gar-tiger, there are already marks on the point of impact, from previous takes.
Not Kansas - S3-E21
Revealing mistake: As the guy fires the machine gun at Guardian, there's a closeup of bullet casings falling to the ground, but they're not just empty casings, they're fired blank rounds.
Revealing mistake: Whenever Isis has to do jumps you can tell it's not her but a stunt double.
Revealing mistake: The scene in the captain's quarters has water dripping from the ceiling. With the ship rocking from side to side, the water drops down perpendicular to the table the whole time, showing the scene is stationary and the camera is tilting. (00:14:00 - 00:14:35)