Sir Roderick Glossop is a well-known "loony doctor" who frequently suspects Bertie Wooster and his friends of some form of mental instability, particularly as a result of an incident involving twenty-three cats. Impersonates a butler, Swordfish, at Brinkley Court in "Jeeves in the Offing" in order to monitor the behaviour of house guest Wilbert Cream. Father of Honoria Glossop and uncle of Hildebrand "Tuppy" Glossop.