Audio problem: When Markie is finally revealing to Helen who she is, Terry Burnham (Markie) is standing behind Janice Rule (Helen) talking to her over her shoulder and can be seen mouthing Janice's lines along with her in between her own.
A Passage for Trumpet - S1-E32
Audio problem: When Joey steps in front of the truck, a lady screams and it shows a close-up of her face. It pans out to a wider shot and for a moment, you can still hear the scream, but the woman's mouth is closed.
Factual error: Decker is flying a Nieuport 28, which entered service in early 1918. However, the date is supposed to be March 5, 1917. Furthermore, the Nieuport was a French-built aircraft that was flown by the French and Americans but not the Royal Flying Corps.
Factual error: Decker speaks of Georges Guynemer's disappearance. Decker believes the date is March 5, 1917, but Guynemer disappeared on Sept. 11, 1917.
Revealing mistake: When Lanser goes below deck frantically trying to find people and tell them to leave the ship, when he opens the door at end of the corridor, it's a bit too obvious that the hallway behind that door is nothing more then just a painting.
Revealing mistake: When all of the neighborhood children push Bevis's car for him, one of them looks directly into the camera.
A Nice Place to Visit - S1-E28
Revealing mistake: When Valentine tries to shoot Pip, he shoots the lamp to see if his gun works. The lamp breaks a full second after he shoots it. It was obviously done by special effects.
Visible crew/equipment: As Henry is walking down the stairs to the bank vault, the camera's shadow is visible on the side of the staircase. (00:09:45)
A Passage for Trumpet - S1-E32
Continuity mistake: When Joey goes into the bar, being invisible, after pouring himself a drink, the bottle rotates on its own accord.
Visible crew/equipment: As Ferris is standing in front of the bakery, you can see the reflection of several crew members in the window. You can also see the reflection of another crew member on the glass inside the phone booth.
Mr. Denton on Doomsday - S1-E3
Continuity mistake: The rum stains on Denton's shirt move in between shots before he starts singing "How Dry I Am." (00:01:45)
The Monsters are Due on Maple Street - S1-E22
Plot hole: The street sign in the beginning is all wrong: it faces the camera rather than the street where the story takes place. In a typical American city, street signs are almost always placed in the direction of the street they are indicating, so drivers on the other street in the intersection know what they are turning onto or passing. In other words, the story is not set on Maple Street! Maple Street is the intersecting street at the end of the road the story is set on.
Other mistake: If the crystal cracked on his pocket watch, why didn't his glasses crack, too?
Continuity mistake: When Decker first exits the aircraft, there is a jeep immediately behind it, a service truck behind the jeep, and a USAF F-100 Super Sabre jet in the background. However, when Maj Wilson escorts him away from the plane, the service truck is gone and the F-100 has been replaced with a large transport aircraft.
Continuity mistake: After Nan sees Hitch-Hiker for first time and she starts speeding away, she has clear road both in front and behind her. But just seconds ago, a mechanic told her to follow him to his shop so he could change her tire. Where did he go?
Continuity mistake: The clock in the booth with a broken face is shown in a distant shot, then in a close-up, where more cracks appear in it than before.
The Lonely - S1-E7
Factual error: Corey is in solitary confinement on an asteroid. However, asteroids are neither large enough nor stable enough to hold an atmosphere. In addition, the distance from earth stated in the episode wouldn't be much further than the moon; there are no asteroids in a stable, regular orbit around the the moon or the earth, nor around the sun anywhere that close to earth.
Continuity mistake: When Ferris enters the cafe and announces they have a customer, he still has the stick in his right hand. He lays the stick on the counter as he begins to climb across. As the camera pans, and then back as he gets on the counter, a menu is now covering the stick.
The Lonely - S1-E7
Other mistake: The supply crew arrives at the asteroid every 3 months, as established by the dialogue between Corry and the astronauts who bring him the female robot. However, Corry's narration reveals that he has been living with the robot for 11 months when the next supply ship arrives.
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.