Continuity mistake: In the scene after the second crash, when the pilot and his wife "borrow" the jeep to return to the base, the shot is flipped, reversing the positions of the husband and wife in a mirror image of the real vehicle, placing the "driver" in the passenger position and the spare tire, which should be on the near side, is now on the far side. In the next shot, as the vehicle nears the base, everything suddenly resumes the correct perspective.
Behold, Eck! - S2-E3
Continuity mistake: When Dr. Stone's assistant helps him up from the floor, there's a lopsided, circular diagram drawn on the chalkboard behind them. One shot later, the diagram has changed into a perfectly round circle and has moved itself several inches higher on the board. (00:06:10)
Cold Hands, Warm Heart - S2-E2
Visible crew/equipment: Barton is terrified by a plant-like alien floating outside his spaceship window. The Venusian critter might be a heck of a lot scarier if it bore less resemblance to a furry stalk of celery - and if only its puppet strings weren't showing. (00:25:45)
Visible crew/equipment: The shadow of the boom mic is visible on the wall on the left side of the screen. (00:31:00)
Visible crew/equipment: The shadow of the boom pole and mic are visible on the floor. (00:22:55)
Character mistake: Dr. Kagan, who's a scientist and should definitely know better, points to Earth's solar system on the chart and calls it "our galaxy." This is roughly the equivalent of mistaking a dot this size [.] for the entirety of North America. (00:23:30)
Visible crew/equipment: During Ellis and Cutler's conversation in the courthouse foyer, the boom shadow makes two appearances: once over Ellis' shoulder when they start across the hall, and again over the elevator doors. (00:10:30)
Continuity mistake: From the Mars rocket's cockpit, Boomer hears Thomas scream once, shouts, "I'm coming!" and races out. When Earth Command hears this on delayed radio transmission 3.5 minutes later (it would take much longer than that from Mars, by the way), there's added dialogue, and this time Boomer never says "I'm coming." We also hear Thomas scream twice instead of just once. (00:07:30)
Revealing mistake: Indicative of previous takes, the floor inside the alien probe already has several human footprints all over it before the characters exit their life boat and walk on it. (00:10:00)
Continuity mistake: In part 1 and part 2, the character that Donald Harron portrays is noted as "Art Harris" in the opening credits of both episodes. The problem occurs during part 2, where the character is repeatedly referred to as "Ray" Harris, the FBS Deputy Director. (00:05:15 - 00:05:50)
Visible crew/equipment: At the start, when Ballard and Harris walk into apartment 17 to wait for Minns, just as Ballard is introduced to the others, the shadow of the boom mic drops down on the door, at the right side of the screen. (00:01:10)
Revealing mistake: Eddy Albert's stunt double is obvious during the avalanche of boulders scene.
Demon With A Glass Hand - S2-E5
Continuity mistake: Trent and the Kiban agent crash through a glass window during their fight in the attic. After Constanza pulls off the alien's medallion and disintegrates him, Trent, who is bent backward at the waist over the windowsill, has instantly moved between takes to a position much farther out onto the ledge.
Continuity mistake: At the end, the unconscious Lt. Branch changes position on the floor between takes. (00:45:05)
Demon With A Glass Hand - S2-E5
Continuity mistake: Trent pushes three of the hand-shaped computer's fingers back as far as they will go, as it instructs him to do. In one brief shot after this, the fingers have returned to their normal position. One shot later, they're pushed back again.
Revealing mistake: Janie is frozen in place on her tricycle, but the 5-year-old actress has a hard time holding still. She's visibly fidgeting. And when a freeze-frame of her is used for close-ups, there's a black blotch on the film over her neck. (00:26:30)
Continuity mistake: Ballard reports that 6 bullets were fired at Minns. He's a trained investigator, but he apparently can't count as well as the viewers can. We saw his men fire at Minns - 7 times. (00:07:40)
Revealing mistake: This episode's futuristic video-phones seem to be a production afterthought not in the original script. Consequently, Mrs. James talks to her husband's clone on the phone, but doesn't seem to see him on the screen. She tells James, "He sounded like you," and goes on about his voice, but never mentions his appearance. Later, her reaction to seeing both of them together indicates she's never seen the duplicate before - even though she has, on the video-phone. (00:25:00)
Visible crew/equipment: When Minns pulls up to get Johnny, the entire camera crew and several lights are reflected in the side panels of his station wagon. (00:32:00)
Factual error: Outside the warehouse, one of Ballard's men is talking on a car phone. We're not sure who he could connect with, though. The car has no mobile transmission antenna, and in the 60s, it would have needed a very large one. (00:26:00)
