David Janssen
— Russ Bogan
Hope Lange
— Elaine Wedell
Ivan Dixon
— Joe Voit
Jason Evers
— Commander Kirk
Charles Robinson
— Lieutenant Nicholson
Ben Piazza
— Lieutenant Whitehead
George Pan Andreas
— Torquale
Sherry Boucher
— Liz McCord
Robert Ito
— Masai Ikeda
William Mims
— Mayne Bradley
Frank Bonner
— Compton