Ralph Watson (born 20 January 1936) has worked extensively in theatre, television and film for over fifty years and continues to do so today.
In the '60s and '70s he appeared in four Doctor Who serials alongside three Doctors, with Patrick Troughton twice. He played the Generator Scientist in The Underwater Menace, Captain Knight in The Web of Fear, Ettis in The Monster of Peladon and Ben in Horror of Fang Rock.
In 2009 he returned to the BBC to record the audio commentary for the Doctor Who DVD box set Peladon Tales where he was reunited with fellow cast members Donald Gee and Nina Thomas, as well as producer Barry Letts and script editor Terrance Dicks.