Starring: Robert Conrad, Dick Cangey, Ross Martin, Whitey Hughes
The Night of the Spanish Curse - S4-E14
Continuity mistake: The last shot before the opening credits, West is knocked out face down with his head resting on this right hand which is on top of his left hand. The very next shot shows West's head resting on his right arm and his left arm is folded underneath his chest.
The Night of the Avaricious Actuary - S4-E11
Continuity mistake: The letter from the Cyclops Insurance Company that Gordon pulls out of his pocket is folded, wrinkled, and well-worn. In the close up of the same letter West reads, the letter is white, pristine, and not wrinkled or folded.
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".