The Citadel is a 1938 British drama film based on the 1937 novel of the same name by A. J. Cronin. The film was directed by King Vidor and produced by Victor Saville for Metro-Goldwyn-Mayer British at Denham Studios. It stars Robert Donat and Rosalind Russell. Plot Dr. Andrew Manson (Robert Donat) is an idealistic, newly qualified Scottish doctor dedicated to treating the Welsh miners suffering from tuberculosis in the Welsh mining village of Blaenely and is an apprentice to Dr. Page (Basil Gill). Initially, he has many lofty scientific goals, but meets local resistance in his research. After his laboratory and notes are destroyed by the miners, he moves to London, taking working-class patients in impoverished conditions. There, his purpose erodes when a chance encounter with a medical school friend, Dr. Frederick Lawford (Rex Harrison) leads to his quiet seduction by an unethical medical establishment, treating rich hypochondriacs. Christine (Rosalind Russell), his wife, tries to set him back on the original path. Dr. Philip Denny (Ralph Richardson), Manson's best friend and still working for improved working-class health, dies at the hands of an incompetent, social-climbing surgeon. Differences from other versions The film is based on the novel, but departs from it in certain vital respects. In the original text, the character of Christine Manson is killed off in a road accident at the point when she and her husband have begun to address problems in their relationship. The incident involving the incompetent surgeon occurs, but it is a minor character who dies. Denny survives, and the understanding (not related in the book but implied) is that he and Manson went into practice together. A 1982 BBC radio adaptation of the novel stays closer to the original text. Cast Robert Donat as Dr. Andrew Manson Rosalind Russell as Christine Barlow Ralph Richardson as Dr. Philip Denny Rex Harrison as Dr. Frederick Lawford Emlyn Williams as Mr. Owen Penelope Dudley Ward as Toppy LeRoy Francis L. Sullivan as Ben Chenkin Mary Clare as Mrs. Orlando Cecil Parker as Charles Every Percy Parsons as Richard Stillman Basil Gill as Dr. Edward Page Dilys Davis as Blodwen Page Joss Ambler as Dr. Llewellyn Nora Swinburne as Mrs. Thornton Edward Chapman as Joe Morgan Athene Seyler as Lady Raebank Felix Aylmer as Mr. Boon Elliott Mason as District Nurse Joyce Bland as Nurse Sharp Eliot Makeham as Dai Jenkins D.J. Williams as Old Thomas