Alfred Hitchcock Host, Executive Producer John Qualen Mr. Stepp Actor Sebastian Cabot Nathaniel Baldwin , Mr. Davidson Actor Philip Reed Walter King Actor Cheryll Clarke Miss Abigail Wilson - Secretary Actor Don Mcart Albert Actor James Adamson Janitor Actor Kate Drain Lawson Landlady Actor Bill Erwin Actor Ruth Lee Actor Arthur Gilmour Actor Robert Patten Detective Actor David Dwight Actor Joseph Ruscoll Writer Francis M. Cockrell Writer Eustace Cockrell Writer Justin Addis Director Jus Addiss Director