Acting Liam Martin Acting What a Nightmare, Charlie Brown! Charlie Brown (voice) 1978 Race for Your Life, Charlie Brown Linus van Pelt 1977 Happy Anniversary, Charlie Brown 1976 It's Arbor Day, Charlie Brown Linus van Pelt (voice) 1976 You're a Good Sport, Charlie Brown Linus van Pelt / Schroeder (voice) 1975 Agent-readable