That Little Old Matchmaker, Martin - S1-E12
Character mistake: In Bill's office, after Tim talks about the acoustics in the building, Bill calls Tim "Bill." (00:15:51)
Revealing mistake: Patty Duke's stand-in is visible behind Cathy when the family is in the front hall welcoming their aunt.
Betty Jo's First Love - S1-E23
Visible crew/equipment: While Billie Jo and Bobbie Jo are dancing with their dates, when Betty Jo stands up and tries to get Orville's attention, the shadow of the moving boom mic is visible at the top, right corner of the screen. (00:19:05)