TV programming shenanigans forced Hallmark to switch from royal romance to the queen of English mystery writers for its pre-Christmas show, but at least the card company has a titled actor in the cast. Hallmark planned to sponsor 'The Royal Romance of Charles and Diana' on CBS.
ABC also had a Charles and Diana epic in the works, so CBS moved up its air date to Sept. 20. Hallmark switched to Agatha Christie's 'Witness for the Prosecution.' Diana Rigg will play the 'witness' role portrayed by Marlene Dietrich in the 1957 film, with Beau Bridges in the Tyrone Power part of the accused murderer. Sir Ralph Richardson takes over for Charles Laughton as defense counsel. Other cast members include Deborah Kerr, Donald Pleasance and Wendy Hiller.