Alan CassidyWritingNo biography available.Known For10.0Where's Willie?197810.0Thunderboat Row19897.0Brothers-in-Law19857.0The Great Brain1978Hope2023Fan ClubNo Nerds have favorited Alan Cassidy yet — be the first.All fan clubsFrom NerdspinFilmographyWriting3Production3Actor2Directing11980Magnum, P.I.TVWriter • 1 episodes★ 7.31978Where's Willie?FilmScreenplay★ 10.01978The Great BrainFilmScreenplay★ 7.0