Born in Cardiff, Wales as John Hailstone, Stone was educated at Brighton College.
He made his first West End appearance in One Wild Oat by Vernon Sylvaine, 1948. Subsequent appearances include the London premiere of Arthur Miller"s A View from the Bridge, Comedy Theatre, 1956. And Suddenly it"s Spring, Duke of York"s Theatre, 1959.
Signpost to Murder, Cambridge Theatre, 1962.
And the role of Crestwell, the laconic butler, in Noël Coward"s Relative Values, Westminster Theatre, 1973. Under contract to Rank, as one of the Sydney Box Company of Youth ("Charm School") in the late 1940s.
Film credits include The Weaker Sex (director Roy Baker), 1948. The Frightened City, 1961.
Masque of the Red Death (director Roger Corman), 1964.
Deadlier Than the Male (1967). And You Only Live Twice (1967). 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 Independent Television thriller series, Destination Downing Street (Associated Rediffusion), which ran for 26 weeks.
Subsequently, he appeared in the British Broadcasting Corporation series, Flesh and Blood (1980-1982) and Strike it Rich (1986/87). Under his birth name of John Hailstone, he authored A Present for the Past, a play premiered at the Royal Lyceum Theatre, Edinburgh, as part of the Edinburgh International Festival of 1966.
lieutenant starred Wendy Hiller, Renee Asherson, and Gwen Ffrangcon-Davies, and was produced by Michael Codron.