Patrick O'Neal

as Captain Adams

as Harmon Gordon

as Frank Flanagan

as Fletcher

as George Bissinger

as Cy Parrish

as Phillip Fowler

as Dale Coba

as Alice's Father

as Kevin Quinn

as Commander Neal Owynn

as Jonathan Meridith

as Dr. Larry Armbruster

as Justus Walters

as John Carter

as Thomas J. Craiden

as Shephard

as George Maxwell

as Max

as Capt. Lionel Beckman

as Maj. Albert Stedman

as Dr. Jim Roper

as Cecil Turner

as Sutton

as Alex Demarest

as Lt. Alan Bruce

as Charles Rone

as Chavez

as Walter Blunt

as Coleman Reeves

as Jason Cravatte

as Victor Allen

as Arthur Gordon

as Dr. Oliver West

as Eric

as Dr. Valentine Peterson

as Dr. Harvey Robert Jones

as Mitchell Campion

as Dr. Tarkington

as Peter Garrison

as Roy Pressfield

as Jud Poag

as Michael Lane

as Arthur Westbrook

as Jackson Dark

as Richard Cutting

as Perry 'Matchless' Liston

as Cliff

as Brooks

as George Baker

as Sailor

as Jeff Manley

as Alex

as Jay Farnum

as Ed Dowling

as Pete Strickland

as John Webber

as Jeremy Siddack

as Kevin Portman

as Bertram Fowler

as Harvey Borden

as Jim

as Self - Peter Garrison (archive footage) (uncredited)

as Harlan Adams

as Tom Farrell

as Dr. Andrew Perkins

as The Married Man

as Randy

as Michael Lane

as Tom Layton

as David Howard

as Leonard Rainier

as George Washington

as Samuel Bennett

as Doctor Emile Snow

as Dick Starrett

as Dr. Daniel Coffee

as Phillip Stanford

as Lane Fielding

as Commissioner Pat Moore

as Dr. Miles Richards

as Police Commissioner

as Norman Cass

as Police Commissioner