He played the title role in the BBC series Prince Regent (1979), and was a sinister immortal Knight Templar in Michael J. Bird's BBC series The Dark Side of the Sun (1983). Egan also played Fothergill in the TV series Reilly, Ace of Spies (1983). In 1986 he had the role of Henry Simcox in the television dramatization of John Mortimer's Paradise Postponed. In 1988 he narrated the Video 125 drivers eye view 1066DC, which was a cab ride in a Network Southeast class 411 4CEP EMU from Hastings to London. He also guest-starred in episodes of The Ruth Rendell Mysteries ("A New Lease of Death," 1991) and A Touch of Frost ("Private Lives," 1999).