Episódio 3

Geraldine Brooks Yvette Leighton

Billy Green Bush Tom - Duckhunter #3 (as William Bush)

Leonard Stone Dr. Phillip Gainer

Janos Prohaska Thetan (uncredited)

Douglas Henderson Dr. Paul Fredericks (uncredited)

Martin Wolfson Dr. Herschel

Clay Tanner Fred - Duckhunter #1

Hal Bokar Bert - Duckhunter #2

Lee Zimmer Carl Ford - TV Announcer

Robert Culp Allen Leighton