Justin Chambers

as Mac

as Tyler(1 ep)

as Marlon Brando(4 eps)

as Alex Karev(1 ep)

as Flash / Barry Allen (voice)

as Ryan Blake

as Donnie Eaton

as Dr. Alex Karev(1 ep)

as Inspector Matt Parish

as Alex Karev(357 eps)

as Rhett Butler

as Chris Lassing(3 eps)

as Self(2 eps)

as Self(2 eps)

as Ryan Eames

as Rick

as D'Artagnan

as Massimo

as Trey Tobelseted

as Adult Hocking(2 eps)

as Caleb Haskell(6 eps)

as Self(3 eps)

as Cole Clayborne

as Rick(1 ep)

as Nicholas 'Nick' Hudson #1(1278 eps)

as Cole(1 ep)