Nick of Time - S2-E7
Continuity mistake: Don Carter is holding a glass of water at the lunch counter. When the shot cuts to him and Pat, his hands are clasped together, empty.
Nick of Time - S2-E7
Continuity mistake: As Don and Pat leave the diner and another couple enters, there are two glasses of tea that have changed position on the table with the Mystic Seer, and two chairs have suddenly materialized at the booth they were using when the other couple arrive to use the Mystic Seer machine.
The Trouble with Templeton - S2-E9
Continuity mistake: When Booth grabs her, Laura's long string of beads breaks. When she starts dancing a moment later, though, they've somehow repaired themselves. (00:18:50)
The Trouble with Templeton - S2-E9
Continuity mistake: At Freddie's speakeasy, when Laura lifts Barney's script from the table, she begins to fan herself. In the wide shot, the script's titled top page with corner diagonal stripes is gripped under Laura's four fingers, with the blank back page at her thumb. It cuts to a close-up, and now the script is gripped in Laura's hand the opposite way, with the top page at her thumb (the back page is blank).
Continuity mistake: Hunnicut puts a cigar on the bar rail when going to talk to a couple, but during the opening narration in the same spot, it's missing.
Continuity mistake: The laser burns on the back of the old woman's left hand disappear when the knife is slicing at her through the door. They return a few shots later, though. (00:10:30 - 00:17:30)
Continuity mistake: The flying saucer the old woman hacks to pieces with an axe is noticeably not the same one that lands in her attic in the beginning. A cruder version was built for the axing scene because the model used was a studio keepsake - the original spaceship from the classic sf film "Forbidden Planet." (00:23:00)
The Odyssey of Flight 33 - S2-E18
Continuity mistake: When the plane first descends, the headphones that the radio controller is wearing keep moving from his neck to head.
The Odyssey of Flight 33 - S2-E18
Continuity mistake: When the jet is preparing to land in 1939 New York City, the view of the crew from the back of the cabin forward shows the airliner captain wearing his headphones, but the next instant close up of him shows him not wearing the headphones.
The Odyssey of Flight 33 - S2-E18
Continuity mistake: The radio operator's hand is gripping a bar behind the airliner captain, then in the next shot it's not.
The Odyssey of Flight 33 - S2-E18
Continuity mistake: There are three scenes of the jet flying above a thin layer of clouds. The same piece of footage is used each time.
Mr. Dingle, the Strong - S2-E19
Continuity mistake: When Mr. Dingle gets ashes from Don Rickles' cigar on his suit, the ashes disappear moments later.
Continuity mistake: When the man rolls the dice onto the bed, one falls off, yet in the next shot we see both of them land on the bed.
A Hundred Yards over the Rim - S2-E23
Continuity mistake: When Joe (the diner owner) hands Christian Horn the glass of water, Horn grabs it by the base of the glass and drinks from it holding it the same way, almost to the last drop. The camera quickly switches the angle to show Horn finishing it close up, but this time he's holding it with his fingers wrapped around the glass. The camera switches the angle again as he's handing it back to Joe, once again holding it by the base.
Will the Real Martian Please Stand Up - S2-E28
Continuity mistake: During the scene in the diner between Ross the Martian and Haley the Venusian, there are objects such as a napkin dispenser visible on the counter over the left arm of Haley, which then disappear in the shots over Ross' right arm.
Continuity mistake: When the Union soldier arrives on the horse, Lavinia points a shotgun at him, holding it at chest level. But when the shot cuts, she suddenly has it up to her cheek. (00:15:00)
Continuity mistake: When Fats makes his shot to set up the last ball for Jesse, the cue ball stops on the bumper side of the dot. When Jesse goes to take the shot, the cue ball is closer to the side pocket he's leaning over.
Continuity mistake: The events shown are supposed to take place at almost exactly midnight, yet when Conny goes to the graveyard the sky is bright and everything is well lit, much brighter than moonlight. Just as he enters the graveyard there is an abrupt change in lighting and the scene is suddenly much darker.
Continuity mistake: During the birthday party scene, as the close-ups and master shot are intercut, Anthony's hair changes back and forth from being combed straight forward to parted on the left and combed to the side. (00:15:10)
Continuity mistake: The captain goes to "Block 6" which we see is the 1st floor with stairs which are in line with the porch, but when he leaves the stairs go off at a 90 degree angle from the porch. (00:04:50 - 00:06:20)
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.