Rosemary & Thyme: The Invisible Worm

The duo are hired to investigate why newly planted roses at an upmarket preparatory school keep dying. After witnessing the arcane ritual of the Night of the Stag, they detect tensions between modernising headmaster Quentin Marshall and established members of his staff who are harbouring secrets someone is prepared to kill for. Drama, guest starring Anthony Andrews (Brideshead Revisited), with Felicity Kendal and Pam Ferris