As Angel in a Box (1979) was Farrah Fawcett's last guest appearance of the third season, and Kate Jackson left the show at the end of this season, this marks the last time that all three original Angels appear together in the show.
In the first office scene, Kelly is wearing a rather large and shiny ring on her left hand's ring finger. Though her character is not married, Jaclyn Smith was married at the time to Dennis Cole, who had just appeared in the previous episode, Terror on Skis (1979).
On January 3, 1979, while filming the episode's climax, stuntman Bobby Bass was driving a car that stuntwomen Julie Ann Johnson and Jeannie Coultar were supposed to jump out of. Bass drove faster than instructed, causing Coultar to suffer multiple injuries and a concussion. Johnson sustained more serious injuries; though unconscious, Johnson was writhing on the ground. Stunt coordinator Ronnie Rondell had to pin her down to stop the chance of her further injuring herself.