Cadfael is Ellis Peters' intuitive 12th century dectective in another sensational mystery. "The Raven in the Foregate," Acorn's sixth DVD single from the hit "PBS Mystery!" series, finds the worldly monk investigating the death of Shrewsbury's new parish priest, a far less worthy man of the cloth. In this baffling mystery, Cadfael discovers a wealth of suspects but a shortage of clues. The series is based on the bestselling novels by Ellis Peters and stars the incomparable Sir Derek Jacobi in his most celebrated role since "I, Claudius."