Actors
RR
Rex Reason
Dr. Cal Meacham
FD
Faith Domergue
Dr. Ruth Adams
JM
Jeff Morrow
Exeter
LF
Lance Fuller
Brack
RN
Robert Nichols
Joe Wilson
RJ
Russell Johnson
Steve Carlson
DS
Douglas Spencer
The Monitor of Metaluna
KL
Karl Ludwig Lindt
Dr. Adolph Engelborg
RP
Regis Parton
Mutant (uncredited)
RD
Richard Deacon
Pilot (uncredited)
CF
Coleman Francis
Express Deliveryman (uncredited)
RW
Robert B. Williams
Webb (uncredited)