Richard Bradford is the only regular actor in the series. Guest stars include some ITC regulars such as Roger Delgado, Stuart Damon, Jane Merrow, Basil Dignam, Ed Bishop, Anton Rodgers, George Sewell, Philip Madoc, and John Gregson; and such actors as Barbara Shelley, Rodney Bewes, Felicity Kendal, Rupert Davies, Colin Blakely, Ray McAnally, Bernard Lee, Jacqueline Pearce, Edward Fox, Sam Kydd and Donald Sutherland.
