Jane Wyman and Marlene Dietrich head a strong cast in this tense, enthralling Hitchcock adaptation of Selwyn Jepson's 1948 thriller "Man Running" about an acting student (Wyman) who shelters her fellow student Richard Todd - with whom she is in love - from police investigating the murder of his mistress (Dietrich's) husband. Still with me? Well, add a superb Alastair Sim, Sybil Thorndike, Kay Walsh and Michael Wilding and we are off on quite a complex mystery with plenty of twists and turns - and quite a bit of humour. If a little bit long, it is still well worth watching.