Robert Banks Stewart (16 July 1931 – 14 January 2016)[1] was a Scottish screenwriter, television producer and former journalist.

Working for Thames Television[5] he contributed scripts to the programmes Callan,[6] Special Branch, The Sweeney and Owner Occupied.

Banks Stewart wrote two popular serials for the BBC science-fiction series Doctor Who when it starred Tom Baker: Terror of the Zygons (1975) (which was set in his native Scotland and drew on the Loch Ness Monster legend)[6] and The Seeds of Doom (1976)[4] (which was influenced by classic science-fiction such as The Day of the Triffids, The Quatermass Experiment and The Thing from Another World).

His final credit for television was for the adaptation of My Uncle Silas (2001–03) starring Albert Finney.

In 2012 Banks Stewart, then aged 81, published his only novel, The Hurricane's Tail,[4] a thriller featuring the British Detective Sergeant Harper Buchanan who uncovers a plot against the prime minister of a Caribbean island.