Freddie Highmore

as Edward Green / Floran Bertrand(12 eps)

as Henry, Duke of Cheshire (voice)

as Stefano Giraldi(8 eps)

as Thom

as Ben (voice)

as Self(8 eps)

as Charlie Brenner

as Dr. Shaun Murphy(126 eps)

as Young Adrian Baton

as Jack

as Victor Ferguson(7 eps)

as Justin (voice)

as Norman Bates(50 eps)

as George Zinavoy

as Nigel Slater

as Arthur Montgomery

as Hally Ballard

as Astro Boy (voice)

as Arthur Montgomery

as Astro / Toby (voice)

as Jared Grace / Simon Grace

as Pantalaimon (voice)

as August Rush

as Arthur Montgomery

as Young Max Skinner

as Self

as Charlie Bucket

as Peter Llewelyn Davies

as Robert

as Raoul Normandin

as Self(1 ep)

as Self(1 ep)

as Self - Guest(3 eps)

as Sam

as Playground Son(2 eps)

as Young Arthur(2 eps)

as Steven Green

as Self(1 ep)

as Self(1 ep)

as Self(1 ep)

as Self - Guest(2 eps)