Roger Caesar Marius Bernard de Delgado Torres Castillo Roberto (1 March 1918 – 18 June 1973) was an English actor.

[4] He served in the Second World War with both the Leicestershire Regiment and the Royal Corps of Signals, attaining the rank of major.

[7] He appeared in the BBC Television serial Quatermass II (1955), the Powell and Pressburger wartime drama Battle of the River Plate (1956), and came to wide popular attention in Britain when he played the duplicitous Spanish envoy Mendoza in the ITC Entertainment series, Sir Francis Drake, from 1961 to 1962, after which he was in much demand.

Delgado was frequently cast as a villain, appearing in many British action-adventure TV series by ITC, including Danger Man (1961), The Saint (1962 and 1966), The Champions (1969), and Randall and Hopkirk (Deceased) (1969).

His films included The Terror of the Tongs, The Road to Hong Kong, The Mummy's Shroud and Antony and Cleopatra.

[8] He began work as The Master on Doctor Who in late 1970, his first broadcast appearance being in the January 1971 adventure Terror of the Autons.

Roger was one of my greatest friends ever - a modest, lovable man with a ready wit and a fine sense of humour.

Delgado died on location on 18 June 1973 in Nevşehir, Turkey, whilst shooting La Cloche tibétaine (Tibetan Bell), a Franco/German television mini-series about the Yellow Expedition.