Project Viper

Mike Connors

Dr. Nancy Burnham

Keach

Sid Bream

Diane Cafferty

Simpkins

Sgt. Tulley

Alan Stanton

MP 1

MP 2

Steve Elkins

Dr. Shoup

General Cartwright

Chambers (Head of NASA)

Gonzales

Sheriff Morgan

Deputy Ferguson

Mr. Norton

Crewman Terrance

Crewman Miller

Local Man

Girl by Pool (uncredited)

Crewman Mitchell