The Naked Monster

Kenneth Tobey

Col. Patrick Hendry

Brinke Stevens

Dr. Nikki Carlton

John Agar

Dr. Clete Ferguson

R.G. Wilson

Sheriff Lance Boiler

John Goodwin

Agent Jeff T. Stewart

Cathy Cahn

Connie Lingus

Robert Clarke

Major Allison

Robert Cornthwaite

Dr. Carrington

Jeanne Carmen

Mrs. Lipschitz

Ann Robinson

Dr. Sylvia Van Buren

Robert Shayne

Prof. Bradshaw

Gloria Talbott

Nikki's Mom

Les Tremayne

General Mann

Lori Nelson

Dr. Helen Dobson

Paul Marco

Kelton the Cop