Charles's last name is never mentioned. In fact, at times the writers had to go out of their way to avoid mentioning his, or his mother's surname. This lead people to think that Scott Baio was once again playing the role of Charles Arcola aka "Chachi" from Happy Days (1974) and Joanie Loves Chachi (1982). Ellen Travolta, played Scott Baio's mother on all three series. On Charles in Charge (1984) her name was Lillian and on the previous two series she was Louisa Arcola-Delvecchio.
Originally broadcast for a year on CBS (October 1984-July 1985), then went to first-run syndication starting in January 1987.
Scott Baio (Charles) and Willie Aames (Buddy Lembeck) are the only actors to appear in all 126 episodes of the series.
If you put the dropped hints and clues together, Charles and Buddy went to Rutgers University in New Brunswick, N.J.