Starring: Robert Conrad, Dick Cangey, Ross Martin, Whitey Hughes
The Night of the Tycoons - S4-E23
Revealing mistake: The exact footage is used in the beginning of the first shot of this episode as well as the when the opening credits have stopped showing - two women walking on the lower right of the screen, two men riding side by side away from the camera, and the coach with one dark and one light colored horse riding into the camera on the screen's left.
The Night of the Brain - S2-E21
Revealing mistake: Mr. Braine screams as his steam-powered chair crashes into the bandstand. If you look closely at the next shot, just before the explosion, you can see that the dummy now in the chair has its head bowed forward. It also has light brown hair, rather than Mr. Braine's silver hair. (00:47:10)
The Night Dr. Loveless Died - S3-E4
Trivia: Dr. Loveless' uncle's name, "Liebknicht", is, aside from the addition of the letter "k", German for "Loveless".