Martin Kove is an American actor and martial artist best known for The Karate Kid (1984), in which he played John Kreese, the head teacher of the Cobra Kai karate dojo. He has reprised the role in two sequels, The Karate Kid Part II (1986) and The Karate Kid Part III (1989) as well as the 2018 television sequel series Cobra Kai. He also appeared as Nero the Hero in Death Race 2000 (1975), and afterward as Clem in White Line Fever (1975). He was a regular on the TV series Cagney and Lacey (1982–1988), portraying Police Detective Victor Isbecki. He appeared in Rambo: First Blood Part II (1985) and Quentin Tarantino's Once Upon a Time in Hollywood (2019).