Alan Scarfe

as Father Cassidy

as Archmagus(2 eps)

as Chancellor Druhin(1 ep)

as Paul Morrow

as Flavin(3 eps)

as Dr. Bradley Talmadge(66 eps)

as William Dyson

as Farmer Brown

as David Ashby

as Robertson Graves

as Martin Joss

as Captain Cyrus Harding(23 eps)

as Dr. Royce(1 ep)

as Montgomery Bennett(1 ep)

as Augris(1 ep)

as General Lucian Alexander

as Wilson Warfield(1 ep)

as Captain Fenard

as Sean Devlin

as Flagler(1 ep)

as Dr. Rubin Zellar(1 ep)

as Sam Steele

as Craig(1 ep)

as David

as Herman Walters

as Hutchins

as Nigel Griffith

as Sam Steele(1 ep)

as George Washington

as Drevni(1 ep)

as Dr. Mason Crane(1 ep)

as Col. Vardovsky

as Admiral Mendak(1 ep)

as Tokath(1 ep)

as Royle Wishart

as Dr. Jim Bayliss

as Eugene Powers

as Brother

as Vladimir Jezda

as Governor Richards

as Jack Trimble

as Mr. Nesbitt(1 ep)

as John Oatis Kendall(1 ep)

as Mysterious Man(1 ep)

as Milo(1 ep)

as Sergeant Tom Coldwell

as Ron Simmons

as Captain Leather

as George Chauvinet

as Doctor #3

as John Websole

as Dr. Jim Bayliss(1 ep)

as George Gimble

as Harrison Sturgess

as Harry Matthews(1 ep)

as Des