Kenneth Mars (April 4, 1935 – February 12, 2011) was an American television, film and voice actor, who specialized in comedic roles. He may be best-remembered, albeit not by name, for his roles in two Mel Brooks films: as the insane Nazi playwright Franz Liebkind in The Producers (1968) and as the relentless Police Inspector Hans Wilhelm Fredrich Kemp in Young Frankenstein (1974).Mars appeared in several seasons of Malcolm in the Middle as Otto, Francis's well-meaning but dim-witted boss.