Steed and Dr Keel return to action in these four recreations of classic lost episodes. 1 The Springers Written by John Whitney and Geoffrey Bellman, adapted by John Dorney Guest cast: Miranda Raison, Dan Starkey, Sarah Lark Steed and Keel go undercover to try and crack a prison escape route. 2: The Yellow Needle Written by Patrick Campbell, adapted by John Dorney Guest cast: Geff Francis, Maggie Service, Derek Ezenagu, Jacqueline Boatswain An attempt is made on the life of Sir Wilberforce Lungi, the Prime Minister of an African country on the verge of independence, and Steed and Keel attempt to expose his enemies. 3: Double Danger Written by Gerald Verner, adapted by John Dorney Guest cast: Dan Starkey, Angus Wright, Jessica Martin, Nicholas Briggs A dangerous attempt to discover a cache of stolen diamonds goes badly wrong, and Keel is captured by a criminal gang. 4: Toy Trap Written by Bill Strutton, adapted by John Dorney Guest cast: Philip Pope, Geoffrey Breton, Harriet Hare, Derek Hutchinson Keel is charged with keeping an eye on the daughter of a friend. But it soon becomes clear that all is not well at her place of employment, a department store in London...