Robin Dunne

as Leland

as Aaron

as Ryan McGregor

as Ryan

as Ryan McGregor

as Ryan McGregor

as Captain Mark Jennings

as Jorgenson

as Andrew

as Lewis

as Gavin

as Young Walter Andrews

as Peter Beckett

as Michael Marlowe

as Woody Markham(2 eps)

as Jonah

as Sam

as Chris

as Jack

as Craig

as Bruce Luxton(1 ep)

as Matt

as Paul

as Robin Daniels

as Taylor

as Adam

as Martin

as Brad

as Josh Carbon(1 ep)

as Paul

as Mitch O'Grady

as Bill

as Robin Daniels

as Tony Shaughnessy

as Victor Susskind

as Cory Morgan

as Aaron

as Drew

as Miko(1 ep)

as Jimmy Anderson

as Robin Hood

as Dr. Will Zimmerman(59 eps)

as Gary / Ignatius the Philosophical Clown

as Trager

as Ray

as Dean

as Joseph Marsden(1 ep)

as Carl

as Thomas "Trip" Hesburgh III(2 eps)

as Young Callaghan

as Hayden Cruise(1 ep)

as Alex Desineau

as Brian

as Ryan Sommers

as Alex(7 eps)

as Michael Hausen

as Richard Ashbury

as Wilman Hilburn (Age 18-26)

as Eric Matthews

as Eric Matthews

as Jeremy Walling

as Sebastian Valmont

as Brian Hanson

as Bill Swenson

as Franz Bhaer(18 eps)

as Todd Winslow

as Gump

as A.J. Moller(4 eps)

as Prince Casib(2 eps)

as Bruce

as Pretty Boy