Martin Kove (born March 6, 1946) is an American film and television actor most recognized for his role as the psychopathic Cobra Kai sensei John Kreese in The Karate Kid film series. He reprised this role in Cobra Kai TV series. He is also known for his work in films such as Rambo: First Blood Part II and on television series such as Cagney & Lacey. He is married to Vivienne Kove and they have twins Jesse (Who plays David) and Rachel.