King Nine Will Not Return - S2-E1
Factual error: Military personnel in the desert would not be wearing dark uniforms but a light khaki tan.
Revealing mistake: When the old lady touches the door handle right before getting cut by the knife she gets paint smeared on her hand from the door handle before being cut with the knife.
King Nine Will Not Return - S2-E1
Factual error: The shape of the B-25's top gun turret is completely different from the turrets actually used on these bombers.
A Most Unusual Camera - S2-E10
Plot hole: How did the brother know where his sister and her husband were located after he escaped and jimmied open their door? The couple was staying in a hotel and they acted like they hadn't seen him in quite a while when he appeared on the picture of him walking in the room. They said he couldn't possibly walk through the door because he's been in prison for a year already.
Nervous Man in a Four Dollar Room - S2-E3
Revealing mistake: When Jackie pulls the wardrobe from the wall and spins it around, The Mirror briefly reflects an area beyond where the set ends.
The Mind and the Matter - S2-E27
Visible crew/equipment: While Beechcroft talks to his boss in the men's room, the boom shadow moves across the wall at the upper right of the screen. (00:03:35)
Visible crew/equipment: When Chris escorts Grandma Bayles up the stairs, a blocking mark is plainly visible at the lower right, chalked on the carpet. (00:05:25)
Answer: It's explained in the episode. The aliens are experimenting to see how humans react to various scenarios. This just happens to involve them using super strength.
Thanks. It's been a long time since I saw the episode so I forgot.