He first appeared on screen in 1976 in the British TV series Flight of the Heron, followed by guest appearances in Sutherland's Law and The New Avengers. From 1979 to 1988 he had a recurring role in Minder as Arthur Daley's nemesis Detective Sergeant Chisholm.
Malahide became a mainstay of British television, appearing in series such as Middlemarch, The Singing Detective and in the first season of The Black Adder (in "The Black Seal" as Guy de Glastonbury). His most recent television appearance was in the 2008 version of Survivors. On film he has appeared in movies such as The World is Not Enough, Brideshead Revisited and Captain Corelli's Mandolin.
|Season two credits|
|The North Remembers||The Night Lands||What is Dead May Never Die||Garden of Bones||The Ghost of Harrenhal|
|The Old Gods and the New||A Man Without Honor||The Prince of Winterfell||Blackwater||Valar Morghulis|
|Season three credits|
|Valar Dohaeris||Dark Wings, Dark Words||Walk of Punishment||And Now His Watch is Ended||Kissed by Fire|
|The Climb||The Bear and the Maiden Fair||Second Sons||The Rains of Castamere||Mhysa|