Best known for playing the role of the fifth doctor on the UK series Doctor Who from 1981 to 1984.
He found his first entertainment job as an assistant stage manager at Nottingham Playhouse.
He also portrayed Tristan Farnon on the long-running comedy series All Creatures Great and Small.
He married his third wife, Elizabeth Morton, in 2003 with whom he had two sons with. He has a daughter named Georgia from his second marriage.
He followed in William Hartnell's footsteps by playing an incarnation of the Doctor on Doctor Who.