as The Preacher(1 ep)
as Factor Lyman(1 ep)
as Bainbridge
as Senator Willis(1 ep)
as Walters
as Packard
as Slabotsky
as Head Engineer
as Grube(1 ep)
as Graydon Hunter
as Martin Herndon
as Judge
as Cantwell
as Dr. Nagy
as Joseph Bellen(1 ep)
as Anson Safford
as Dr. Mark Gregory(1 ep)
as George Carlisle(2 eps)
as Mr. Pomeroy
as William Gehrig(1 ep)
as Doctor Anderson(1 ep)
as Warden James(1 ep)
as Stuart(1 ep)
as Admiral Henry Victor Leslie Fox(30 eps)
as Myles Prentice(1 ep)
as Simmons
as District Attorney(1 ep)
as Varro
as U.S. Gen. John B. Medaris
as Hurtelaut
as Mr. Collins
as McGuffey
as United States Secretary of Defense
as Clem Krivak
as Ken Cullum(1 ep)
as Charles Stevens(1 ep)
as John(1 ep)
as Captain of a cargo vessel(1 ep)
as Anthony Pinkerton(1 ep)
as Father(1 ep)
as 'Dr.' Barney Weaver(1 ep)
as Dr. Fleming, Space Command(13 eps)
as Dr. Ben Edwards
as Red North