While appearing in this series, Robert Hays co-starred in Airplane! (1980) in which he danced to The Bee Gees' "Stayin' Alive," the song that opened Saturday Night Fever (1977) in which Donna Pescow made her feature debut.
Pilot was taped in May, 1974, but aired February 8, 1979.
Marie was Angie's younger sister, however Debralee Scott was actually a year older than Donna Pescow.
Debralee Scott and Donna Pescow both worked with John Travolta: Scott on Welcome Back, Kotter and Pescow on Saturday Night Fever.