Thark is a lively British filmization of a popular theatrical "old dark horse" satire. Aldwych Theatre stalwart Tom Walls directs the film and stars as real estate agent Sir Hector Benbow. The peer sells mysterious Thark Manor to Mary Brough, who has good reason to suspect that the joint is haunted. To prove her wrong, Benbow and his confreres (Ralph Lynn and Evelyn Bostock) spend the night in Thark Manor. Ben Travers, who along with Tom Walls virtually lived at the Aldwych Theatre, was the playwright responsible for this goosepimply gagfest.