As well as working in films, Berkoff regularly appears as guest star in many television series.
As a jobbing actor he appeared The Avengers (1961), The Saint (1962) and The Professionals (1970), in all of these inevitably playing the "baddie". In UFO (1970) he appears in a number of episodes as a space fighter pilot.
More significant roles include playing Adolf Hitler in the mini-series War and Remembrance (1998)- his favourite villainous role.
Berkoff regularly appears as guest star in television series including StarTrek Deep Space Nine (1993), Nikita (1998), Jonathan Creek (2001) and Children of Dune (2003). In the documentary Brasseye Berkoff seems to be the only person to realise it is a spoof.