Brandon Cruz, who played young Eddie Corbett, later went on to become a stalwart of the Southern California hardcore punk scene. Initially fronting the Oxnard, CA based band Dr. Know from 1981-1983, he later went on to sing for Bay Area-based hardcore punk legends Dead Kennedys when they re-formed without founding vocalist Jello Biafra from 2001-2003. Having survived being a child star, Cruz is quoted as saying, "Surfing and punk rock saved my life."
An alternate version of the theme song "Best Friend" called "Girlfriend" was Recorded/Published: June 24, 1968. According to the discography on harrynilsson.com, "Best Friend" was Recorded/Published: 1969.
One of the paintings which regularly furnished the Corbett apartment, a gold framed portrait of a girl with braids, appeared previously in the movie, "Speedway", one of the two movies Bill Bixby acted in with Elvis Presley.
Bill Bixby takes over the role of Tom Corbett from Glenn Ford. Both men went on to appear in popular comic book adaptations. Ford played Jonathan Kent, adoptive father of Clark Kent, in Superman (1978). Bixby went on to play Dr. Banner on Incredible Hulk....played by Lou Lou Ferrigno.
Her role as Mrs. Livingston became the final performing role for Miyoshi Umeki. After her self imposed retirement from the screen, she joined her new husband in his film editing equipment rental business. She would pass away 35 years later in Missouri.