Gareth Jones (6 June 1925 Lampeter, Wales – 30 November 1958) was a British actor, chiefly remembered for the circumstances of his death.
During a 1958 live television broadcast of the Armchair Theatre play Underground on the ITV network in the UK, Jones suffered a massive heart attack and died while off-camera between two of his scenes. Director Ted Kotcheff and the remaining cast were forced to improvise to carry the play to its conclusion, with producer Sydney Newman ordering Kotcheff to "shoot it like a football match". Coincidentally, Jones's character was to have suffered a heart attack during the play.