At the beginning of this episode there is a shot of Mammoth Studio and the following shot is a canned shot of a banner advertising "Twilliger's 20" used in a previous episode (Season 3 Episode 19) entitled "Marathon Angels" where Kris & Kelly enter the Twilliger's 20 race as a part of their investigation & wind up having to chase the suspects on foot through Mammoth Studio.
Ed Ruffalo (Bob Micklin) previously appeared as different characters in season three's Angel on My Mind (1978) and Angels in Waiting (1979), and season four's One Love... Two Angels: Part II (1980).
Denny Miller (Jeff Stanowitch) previously appeared as different characters in season two's Circus of Terror (1977) and season three's Angels on Vacation (1979).
John Epper (Big Teddy) previously appeared as a different character in season two's Angels in the Wings (1977). Portraying the owner of a stuntman school wasn't much of a stretch for Epper, who has more stunt credits than acting credits.
Tommy Reamon (Ed) previously appeared as a different character in season three's Counterfeit Angels (1979).