Michael O'Keefe

as Jake

as Ron Cooper

as Colin Blair

as Jack Kent Cooke

as Travis Laughton

as Mr. Donaghy

as National Security Advisor

as Jerry

as Harry McGyver

as Ken Stanitzke

as Detective Winslow

as Self

as Himself

as Sam

as Harry Eshelman

as Mr. Deavers

as Director Jack Walters

as Frank Rigby

as Ben's Dad

as Harris Waylon Greer

as Walters

as Professor Aaron Wilkins

as Frank

as Chris Flowers

as Dr. Helzer

as John Redmond

as Hugh Akston

as Dr. Stuart

as Himself

as Darren Hoffman

as Philip Gifford

as Alan Ascher

as Calvin Beckett

as Trooper Finnerty

as Barry Grissom

as Reverend Bill Collier

as Father Lloyd Tierney

as Wallace

as Detective Griffin

as Wally Wandell

as Dr. Calvin Byrd

as Dr. Stan Howard

as Agent Tim Hecht

as Reverend Joseph Ezra

as Jack Scott

as Fletcher Stone

as Mike Harris

as Richie

as Michael McShale

as Eli Rush

as Dave Baker

as Duane Larsen

as Dennis

as Daniel Easton

as Wayne

as Will Sawyer

as Ronald McCain

as Al Marcosi

as Eugene O'Hanigan

as Merrida Coxwell

as Garrett James

as Kevin Hunter

as Ken

as Adult Tom

as Eddie Wexler

as Journalist

as Jack Bolder

as Michael

as Ron Steffey

as Frank Reade

as Cally Lonegan / Professor Donald Lonegan

as Jack Hays

as Walt Colton

as Mike Medwicki

as Dan

as Sgt. Mike Fitzgerald

as Fred

as Dr. Cassius William 'Bill' Sander

as Billy

as Jake Bateman

as Art Toomey

as Darryl Palmer

as Michael Rangeloff

as Richard Shepard

as Nathaniel Williamson

as Danny "Joshua" Stetson

as Lt. Walter Cohen

as Danny Noonan

as Ben Meechum

as Harris

as Worthy Pettinger

as Horseman

as Terry Long

as Josh Birdwell

as Corporal Travis

as Chad Marshall