Most of this title revolves around Kelly. The other 2 angels are barely seen at all, briefly at the start, and then not at all, until less than 15 minutes from the end.
A year earlier, in the penultimate episode of the fourth season of Starsky and Hutch (1975) (another Spelling-Goldberg production) used the same plot device of investigative partners falling in love with the same person. In Starsky vs. Hutch (1979), Detectives Starsky and Hutchinson even come to blows over the woman.
Kelly is believed to actually be Margaret Ellen Barrows. Coincidentally, Ellen is Jaclyn Smith's middle name.
This two-part episode serves as the finale for Tiffany Welles' sole season as an Angel.
Although she never had a career as a singer, recordings of Lynne Marta (Linda) singing songs written by Edward J. Lakso were used in season two's Angel Blues (1978) and season four's Catch a Falling Angel (1980).