English television presenter who hosted the BBC children's show Blue Peter from 1967 until 1978. Also a television actor, he played the role of Steven Taylor in the popular Doctor Who series.
Originally intending to become a teacher, he studied at the Alsager College of Education.
He directed numerous theatrical pantomime productions and frequently worked with the Chuckle Brothers comedy team.
After divorcing Gilly Fraser, he married Kathryn Evans.
He and fellow actor Jon Pertwee were friends.