Anthony Steel

as Director General (1 episode)

as Earl Godwin (2 episodes)

as Tristram Guise

as Harker Le Fevre (1 episode)

as Lintom Busotsky, Film Producer

as Sir Derek Ridgeley ("Murder at Midnight")

as Conrad

as The Stranger (1 episode), as 'Timber' (1 episode)

as Supt. Jeff Hawks

as Max Boothroyd (1 episode)

as Sir Harry Adams (1 episode)

as Moncrieff Dovecraft

as Sir Charles Milvern (1 episode)

as Richard Butler

as Robert

as Sir Stephen

as Mr. Burton

as SS-Sturmbannführer Domizlaf

as Mr. Burton (1 episode)

as Adam Ferris (1 episode)

as Geoffrey Underwood (1 episode)

as Carlsson (3 episodes)

as Col. James Steele

as Sir Robert Gunningham

as Maurice Pouliard