Alfred Hitchcock Host, Executive Producer, Director John Williams Herbert Carpenter Actor Isobel Elsom Hermione Carpenter Actor Arthur Gould-Porter Major Sinclair Actor Gavin Muir Mr. Wallingford Actor Katherine Warren Mrs. Freda Wallingford Actor Gerald Hamer Mr. Hewitt Actor Irene Tedrow Mrs. Hewitt Actor Ross Ford Mr. Hall Actor Theresa Harris Elsie the Servant Actor Molly Glessing Elsie the Servant Actor John Collier Writer Francis M. Cockrell Writer