James Farentino
— Kevin Leahy
Claudette Nevins
— Ellen Sumner
Eugene Roche
— Sgt. Taplinger
Harrison Ford
— Paul Winjam
Ann Dusenberry
— Weezie Sumner
Diana Scarwid
— Lane
Joan Hackett
— Louise Gelson
Dinah Manoff
— Celia
Carol Jones
— Alex
P. J. Soles
— Marty
Ethelinn Block
— Barry
Susan Walden
— Student
Lawrence Bame
James R. Parkes
Catherine Cunneff
Stephanie Barton-Farcas
— Biology Student (uncredited)