Henry Czerny

as Glenn(6 eps)

as Self

as Henry

as Martin Ward(6 eps)

as Rabbi

as Kittridge

as Mitchell

as Landro

as Kittridge

as Dr. Christopher Stone

as Dr. Moridis / Policeman #2 / Security Guard (voice)

as Doctor M. (voice)(2 eps)

as Frederic Mason

as Tony

as Alan Crellin(8 eps)

as Detective Harris

as Jacob

as Winslow Schott / Toyman(2 eps)

as Charles Guttman

as CIA Director Matthew Keyes(7 eps)

as Arthur Izikoff(1 ep)

as Artie Camden(1 ep)

as Conrad Grayson(68 eps)

as The Other Gentleman (voice)(10 eps)

as Lt. Terry Clayton(2 eps)

as Director McCready

as Nathan

as Nathan(1 ep)

as Marcus

as Norman

as Robert Griffith

as Corporal Alex Stanton

as Howard Morrisey

as Duke of Norfolk(10 eps)

as Jonathan Bottoms

as Yuri

as Neale Donald Walsch

as Mr. Whitney

as Matt Mallinson(1 ep)

as Dr. Briggs

as Rick

as Robert Mercher(1 ep)

as Capt. Martin Jenkins

as Denny

as Frank

as Ivan

as Samuel Parris(2 eps)

as Michael Gold

as Aaron Larkin(1 ep)

as Luke(4 eps)

as Steven

as Ernst

as Ernst(2 eps)

as Ted Merrick

as Fr. Raymond McBride

as Alan Brooks(1 ep)

as Truman

as Greenwood

as Greenwood(2 eps)

as Arthur Bradley

as Ludwig van Beethoven(1 ep)

as Sam "Chip" Sheppard

as Robert Peary

as Asa Robinson

as George Clair

as Royal Leckner

as Ken Altman

as Kittridge

as Alex

as The Underground Man

as Michael Coleman

as Bill Sanger

as Martin

as Lawson Hughes

as CIA Deputy Director Robert Ritter

as Brother Peter Lavin

as Ed Rodgers

as Daniel Metz

as Joseph Riggs

as Casey Baldwin

as Sean Mathieson

as Petty Officer Lang (Coxswain)

as David Dawson(1 ep)

as Peter Lavin

as Fred Burham

as Rick Peterson

as Nelson

as man in phonebooth (uncredited)

as Michael(1 ep)

as Engelking(1 ep)

as Sessler(1 ep)

as Oliver Montcalm(1 ep)

as Gregory O'Toole(1 ep)

as Police Officer Dennison(1 ep)

as Lucentio

as Joe Nelson(1 ep)