Kove appeared as Cully in the 19671969 CBS series, Gentle Ben, with Dennis Weaver and Clint Howard. He was cast as George Baker in the short-lived CBS series Code R about the emergency services in the California Channel Islands. His co-stars were James Houghton, Tom Simcox, and Joan Freeman. He also starred in the short-lived science fiction series Hard Time on Planet Earth and made guest appearances on several television programs including Gunsmoke, Three for the Road, Kojak, Quincy, M. E., The Incredible Hulk, ', The Rockford Files,The Streets of San Francisco, and Black Scorpion. 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 senseiJohn Kreese. After playing a traitorous helicopter pilot in the 1985 film', he appeared again 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. Kove appeared in as the Shadow Assassin in Episode 3, Season 1, "Shadow Assassin", which aired on 3 February 1993, and in Episode 23, Season 2, which aired on 26 January 1994. He appeared in the 2007 music video for the song "Sweep the Leg" by No More Kings as a caricature of himself and John Kreese from The Karate Kid. 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. In 2017, Kove parodied his Karate Kid character in the Season 4, Episode 17 episode of The Goldbergs. In 2018, Kove returned to the character of John Kreese for the YouTube Premiumweb series, Cobra Kai, a sequel series of the Karate Kid franchise which is set 34 years after the 1984 film. In 2019, Kove again parodied his Karate Kid character in an ad for QuickBooks, in which a kinder, gentler Kreese runs a "Koala Kai" dojo of preteen students who are encouraged to "support the leg" and to show "more mercy".
