On television, he portrayed Claudius in the BBC series I, Claudius (1976), for which he won the British Academy Television Award for Best Actor. He received two Primetime Emmy Awards for Outstanding Supporting Actor in a Miniseries or Movie for The Tenth Man (1988), and Outstanding Guest Actor in a Comedy Series for Frasier (2001). He also took roles in ITV drama series Cadfael (1994–1998), the HBO film The Gathering Storm (2002), the sitcom Vicious (2013-2016), in BBC's Last Tango in Halifax (2012–2020), and the Netflix series The Crown in 2019.
On television, he portrayed Claudius in the BBC series I, Claudius (1976), for which he won the British Academy Television Award for Best Actor. He received two Primetime Emmy Awards for Outstanding Supporting Actor in a Miniseries or Movie for The Tenth Man (1988), and Outstanding Guest Actor in a Comedy Series for Frasier (2001). He also took roles in ITV drama series Cadfael (1994–1998), the HBO film The Gathering Storm (2002) the sitcom Vicious (2013-2016), in BBC's Last Tango in Halifax (2012–2020), and the Netflix series The Cr,own in 2019.