Stone was under contract to Rank as one of the Sydney Box Company of Youth ("Charm School") in the late 1940s.

Stone was a familiar face on British television from the 1950s-1980s, and featured as Captain John Dillon in Quatermass II (1955).

In 1957, he starred as special agent, Mike Anson, in an early ITV thriller series, Destination Downing Street (Associated Rediffusion),[5] which ran for 26 weeks.

From 1971 to 1974 Stone played Dr Ian Moody in the Yorkshire Television series, Justice, opposite Margaret Lockwood, his offscreen partner of seventeen years.

[8] It starred Wendy Hiller, Renee Asherson, and Gwen Ffrangcon-Davies, and was produced by Michael Codron.