At 15, got hooked on acting after being cast as Mark Antony in a school production of Shakespeare's Julius Caesar.
Trained at the Royal Academy of Dramatic Art in London, and in the late 1950s got first breaks in walk-on roles with the theater company that would become the Royal Shakespeare Company in 1961.
Beginning with a duel with the title character in Tom Jones (1963), has played a long list of screen villains, including the alien monster Scaroth on a 1979 episode ("City of Death") of TV's Doctor Who; an Imperial general in Star Wars Episode V: The Empire Strikes Back (1980); the main antagonist of James Bond in For Your Eyes Only (1981); and the American Nazi in Indiana Jones and the Last Crusade (1989).
In 1993, won an Olivier Award for Best Supporting Actor in a Royal Shakespeare Company production of Henry IV.
Half brother, Robert Wyatt, is a founding member of the 1960s English prog-rock band Soft Machine.
2011, Screen Actors Guild Awards — Outstanding Performance by an Ensemble in a Drama Series: Nominee
2014, Screen Actors Guild Awards — Outstanding Performance by an Ensemble in a Drama Series: Nominee