The Night of the Headless Woman - S3-E17
Continuity mistake: When West comes out of the water, he is soaking wet, but when he sneaks onto the stagecoach and fights with the driver, both his hair and clothes are dry.
The Wild Wild West (1965)
1 mistake in The Night of the Headless Woman
Starring: Robert Conrad, Dick Cangey, Ross Martin, Whitey Hughes
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".