Matthew George "Matt" Frewer is an American Canadian actor, singer, voice artist and comedian. Acting since 1983, he is best known for portraying the 1980s icon Max Headroom, Hades' henchman Panic in Hercules, the retired villain Moloch in Watchmen, cancer patient Mitch in 50/50, Doctor Leekie in the Canadian science fiction drama Orphan Black and Sherlock Holmes in four Hallmark Channel television productions released between 2000 and 2002.