This is episode was the fifth to air in the second season, but was actually the first to be produced. It was written and shot two different ways: one in case Farrah Fawcett returned to the show to play Jill (by shooting around her scenes) and the second way is how the episode aired, with Cheryl Ladd as Jill's sister Kris.
The costume Cheryl Ladd wears as the knife-thrower's assistant is one of the Feline centerfold costumes from season one's Lady Killer (1976), like the one Farrah Fawcett wore when she was undercover.
Denny Miller (Helmut Klaus) later appears as different characters in season three's Angels on Vacation (1979) and season five's Stuntwomen Angels (1981).