Austin Willis

as The Preacher (1 episode), as Factor Lyman (1 episode)

as Bainbridge

as Senator Willis (1 episode)

as Walters

as Packard

as Slabotsky

as Head Engineer

as Grube (1 episode)

as Graydon Hunter

as Martin Herndon

as Judge

as Cantwell

as Dr. Nagy

as Joseph Bellen (1 episode)

as Anson Safford

as Dr. Mark Gregory (1 episode), as George Carlisle (2 episodes)

as Mr. Pomeroy

as William Gehrig (1 episode)

as Doctor Anderson (1 episode)

as Warden James (1 episode), as Stuart (1 episode)

as Admiral Henry Victor Leslie Fox (30 episodes)

as Myles Prentice (1 episode)