Besetzung
William Shatner
Prof. Stephen Turner
Lynn Carlin
Barbara
Estelle Parsons
Crossland
Richard McKenzie
Mr. Dennison
Stephen Macht
Dahlquist
John Travolta
Lab Technician (uncredited)
Viveca Lindfors
Mrs. Schnagel
Fred J. Scollay
Dr. McBride
Charles White
Harry Vogel
Damon Evans
Roy Poole
Dr. Goodman
Mike Kellin
Mancuso
Lindsay Crouse
Karen
Jeff Pomerantz
Professor
Ossie Davis
Reed