John Shea

as Mr. Stein

as Colonel William Donovan

as Abe Dietrich(1 ep)

as Chief Maguire

as Marshall

as President Eckhart(10 eps)

as Ted Graham(1 ep)

as Davis Harriman

as Senator Brian Warwick(1 ep)

as Mr. Laurence

as Dr. Egan

as Bill Wellstone(1 ep)

as Robert

as Judge Franklin Whitaker(1 ep)

as Sam Whitaker

as Julius Caesar

as Dad

as Dr. Kirk Connor(1 ep)

as Jeffrey Agos(2 eps)

as Theodore Robertson

as Kristopher Merced(1 ep)

as Robert

as Harold Waldorf(6 eps)

as White Man

as Dr. Marcus Eldridge(1 ep)

as David Morrow(1 ep)

as Milo Henderson / Dr. Jonathan

as Adam Kane(50 eps)

as Jack Walker II(1 ep)

as Trevor Lipton(1 ep)

as Dr. Jonathan Abbott(2 eps)

as Hartley Cole

as Mr. DeMarco

as Peter Binda

as Dominic(1 ep)

as George

as Harry Latham / Lassiter(3 eps)

as Harry Latham / Lassiter

as Michael Kaye

as Sheriff Matthew Bradshaw

as Dr. Michael Ravenson

as Tommy Marchant

as Nick Donovan

as Lex Luthor(25 eps)

as John Barnes (voice)

as Jack Packard

as Hendrickson

as Alessandro(1 ep)

as Devlin

as Hank Zaret(13 eps)

as John David Myers(1 ep)

as Isaac Waxman(1 ep)

as Frank Joziak

as Frank Joziak(2 eps)

as Roger Dollison

as Father John Sejac (segment "As Ye Sow")(1 ep)

as Troy Gardner

as Sam Wyatt

as Bill Stern(2 eps)

as Doc

as Eli Cohen

as John Carloff

as Marcus

as Michael O'Donnell

as Zachary 'Zack' Freestamp

as Brian Whitman(1 ep)

as Karl Hoffmann

as Elie Cohen(1 ep)

as Various

as Danny

as Jeremy(1 ep)

as Robert F. Kennedy(3 eps)

as Charles Horman

as James Cookman

as James Cookman(2 eps)

as Emory Cole

as Terry Garrigan(3 eps)

as Joseph

as Romeo(1 ep)