Gideon Fell Mysteries: BBC Radio 4 Full-cast Drmatisation. Starring Donald Sinden, John Hartley & Nigel Davenport

Two Radio 4 dramatizations featuring the pre-World War II sleuth, Dr Gideon Fell. In "The Hollow Man", two murders are committed by someone who, it seems, is both invisible and lighter than air. "The House in Gallows Lane" involves a poisoner whose victims were all married to the same woman.