Ronne Troup, who played Janice, was the daughter of Bobby Troup, who played Dr. Joe Early on the TV series "Emergency". She previously played Polly, Chip Douglas' wife on "My Three Sons". She was cast as Sister Bertrille on "The Flying Nun" but was replaced by Sally Field.
Tom Bower, who plays Oscar Gideon, played the character of Marvin, the maintenance man who assists John McClane in his fight against terrorists at Dulles Airport in the film "Die Hard 2".
Stuart Margolin, who played B.J., previously played recurring character Angel Martin on the TV series "The Rockford Files".
Edd Byrnes, who played Inspector Walker, previously played the character of Kookie in the TV series "77 Sunset Strip". He also played the character of Vince Fontaine in the iconic 1978 film "Grease".