Peter Graves

Jeff Knight

Eileen Dietz

Dana

Paulette Breen

Lena

Frank Ashmore

George Walker

Dick Sargent

Dr. Jameson

Zale Kessler

Dr. Nelson

William Bufkin

Clone

Tony Haig

Jack

Boyd Holister

Senator

Keenan Wynn

Jake Noble

Lurene Tuttle

Anna Noble

James Mantell

Ricky Knight

David Hooks

Richard Knight

Frank Birney

Reporter Birney

Rick DiAngelo

Guide #1

Eugene Robert Glazer

Guide #2 (as Gene Glazer)

Tim Donnelly

Richard (as Timothy Donnelly)

Chuck Hayward

Walker Man