Jake Weber

as Don

as Curtis Clark

as Lock

as Huxley

as Nichols

as Jim Carter(1 ep)

as Boone

as Owen Casserly

as Mitch

as Terry

as Artemis Serac

as Rear Admiral Raymond Spruance

as Captain Joe Turner(4 eps)

as Dr. Edwards

as Colonel Plymouth

as Zareh(3 eps)

as Sgt. McCulvey

as Barry Walker(7 eps)

as Wally(1 ep)

as Ethan Barrett(3 eps)

as Dr. Bill

as Ted

as John

as Gregory Devry(1 ep)

as Agent Hope

as Micah(3 eps)

as Brad Fittler

as Geoffrey Silver(1 ep)

as Man

as John Campbell(14 eps)

as Brett O'Keefe(18 eps)

as Christophe Granger(1 ep)

as Bill Fickner(1 ep)

as Gabriel Gleason(1 ep)

as Robert Hartley

as Phil Anwar

as Joe Dubois(128 eps)

as Joe Reese(1 ep)

as Michael (voice)

as Officer Powell

as Michael

as Man in Adult Section

as Self

as Bobby Davis

as Ben Bloom

as George

as Karl Atwood(1 ep)

as Jake Berman(20 eps)

as Pete Dearborn(2 eps)

as Gordon Ramsey

as Lt. Hirsch

as Dr. Beverly Kirk

as Robert "Bob" Flynn(1 ep)

as Daniel Connelly

as Barry Plotkin

as Drew

as Adam

as King Henry

as Mr. Wright

as Tolliver Tynan

as Virginia Officer(6 eps)

as Dr. Matt Crower(18 eps)

as Bo

as Richie Wainwright(18 eps)

as Bo

as Bo(2 eps)

as Curtis Morgan

as Richard

as Yaakov

as Bobby

as Wesley Parker(1 ep)

as Donna's Boyfriend - Syracuse, NY

as Tolliver Tynan(1 ep)