Anne Francis who plays a character named Honey Best in this episode, starred in the series Honey West (1965), the pilot of which was an episode of the original Burke's Law (1963).
In addition to Anne Francis, other guest cast members played detectives in previous TV shows. Edd Byrnes 77 Sunset Strip (1958), Tanya Roberts Charlie's Angels (1976) playing a character named Julie who was described as an 'Angel," Buddy Ebsen Barnaby Jones (1973), Jameson Parker Simon & Simon (1981) and Martin Kove Cagney & Lacey (1981).
Both Buddy Ebsen and Gene Barry topped the bill on the UK's top variety programmes of the 1960s Val Parnell's Sunday Night at the London Palladium (1955).