Kove appeared as Cully in the 1967-1969 CBS series, Gentle Ben, with Dennis Weaver and Clint Howard. He was cast as George Baker in the short-lived CBS series Code R (1977) about the emergency services (fire, police, and ocean rescue) in the California Channel Islands. His co-stars were James Houghton, Tom Simcox, and Joan Freeman.
Kove was a cast member on the 1982–1988 CBS television series Cagney & Lacey as Detective Victor Isbecki.
Kove appeared in the 1984 hit film The Karate Kid as Cobra Kai sensei John Kreese. After playing a traitorous helicopter pilot in the 1985 film Rambo: First Blood Part II, he reprised his role as Kreese in the 1986 sequel The Karate Kid, Part II and the 1989 sequel The Karate Kid, Part III. He studied Okinawa-te Karate under prominent black belt Gordon Doversola Shihan.
In 2007, Kove appeared in the No More Kings video "Sweep The Leg", in a parody of his Karate Kid character. He appeared on Tosh.0 as his character from The Karate Kid, John Kreese, where he spoofed the final fight on the "Board Breaker Web Redemption". At the end of the skit, Daniel Tosh, dressed as Mr. Miyagi, honks Kove's nose, a reference to Mr. Miyagi's action in the scene at the beginning of The Karate Kid, Part II.
