My Sister, the Homemaker - S5-E12
Visible crew/equipment: At the beginning of the episode, Jeannie is talking on the phone by the stairs and her sister is hiding behind the banister. Her sister stands up for a moment and shows her full face, revealing that it is actually Barbara Eden's stand-in wearing the green costume.
Two Nazis for the Price of One - S3-E17
Visible crew/equipment: A string is seen attached to Colonel Klink's cap that is used to yank off the cap after Colonel Mannheim fires his pistol at Klink.
No Exchange on Damaged Merchandise - S1-E9
Visible crew/equipment: During the opening sequence, the bad guys' red Ford Galaxy reflects a bank of studio lights when the door is opened. (00:03:30)
Visible crew/equipment: When Max and 99 are trapped in the room with the hatch that leads down to the Guru's chamber, the filmmakers didn't bother to make it seem like a giant hole in the ground, and they also didn't bother about the floor of the set being about ten centimetres below the hatch.
Carpetbagging, Anyone? - S2-E28
Visible crew/equipment: In the opening sequence, when troopers Stanley and Livingstone are heading towards the Captain's office, shadows of a production light and a boom mike and operator are seen on the ground.
Visible crew/equipment: When Will and Dr. Smith first come upon the Trader's encampment, just as the dogs start to attack you can see the head of a crew member (dog trainer?) bob in and out of view from directly behind where the dog on the right was lying...from behind the boxes stacked on the ship's platform. (00:08:38)