Duncan Lamont
From Tardis Wiki, the free Doctor Who reference
Duncan Lamont played Dan Galloway in the Doctor Who story Death to the Daleks. He also appeared in the pioneering sci-fi BBC TV serial The Quatermass Experiment in 1953, playing the infected astronaut Victor Carroon. He died during filming of the Blake's 7 episode "Hostage"; actor John Abineri (who also appeared in Death to the Daleks) replaced him.