as Captain Massey(3 eps)
as Mr. Spelman
as Arthur Gramble(1 ep)
as Marshall Campbell(1 ep)
as Mr. Callender(1 ep)
as Hunt Acrey(1 ep)
as Ivan Ford(1 ep)
as Harold Rhodes
as Ben Proctor(1 ep)
as Dr. Jimmy Goldrich
as Ronald Andersson
as Henry Richards(3 eps)
as Mark Fox(1 ep)
as Major General Leonard Onichimoski(1 ep)
as Dan Morrison(1 ep)
as Mac Lawton
as Stanley Robman(1 ep)
as Pe'Nar Makull(1 ep)
as Robert Denk
as Dr. William Crichton(1 ep)
as Dr. Daniel Waterston(1 ep)
as Roy Hondo(1 ep)
as Marcus Hiller
as John
as Jesse Wilder
as David Alcott(1 ep)
as Dylan Elliott(12 eps)
as David Mason
as Conway
as Serge Markov(2 eps)
as Warren Smyth(1 ep)
as Evan Stark
as James Allen Howard(1 ep)
as Evan Stark
as Jerry
as Tony Kirby
as James Ryerson(1 ep)
as Ben Judson(1 ep)
as Leo Vardian(1 ep)
as Julian
as Martin Elson
as George Bennett
as Joe
as Aleck Olson
as Davy
as Tick Gleason(1 ep)