Don Franklin

as Larry Dersh

as Dr. Art MacGregor

as Lincoln Thorsen aka Flex

as Captain Dave Rothall

as Ron 'Slacks' Sacks

as Tommy Zane

as Bart Jameson

as Capt. Alan Beck

as Dr. Fischman

as Ian Hughes

as Agent Biller

as Tourist in Hall of History [Eight Years Later]

as Greg Martinson

as Kelvin Blake

as Tim McAllister

as Malcolm

as Commander Jonathan Ford

as Kevin

as Todd Marvin

as Lonnie Washington

as Randall Mathis

as Max Pierson

as Paul Hager

as Mr. Diggs

as Craig Donovan

as Clive (uncredited)

as Ben Dodd

as Shelby

as Stan Wright

as Mr. Beck

as Evan Harris

as Noah Dixon

as AJ

as Paul Ehrlich

as Rob

as Michael Stafford

as Basil

as Peter Callas

as Alex Wheeler

as Det. Collins

as Alex Wheeler

as Calvin Garvey

as Reporter #1

as Commander Jonathan Ford