Ralph Smart Creator, Writer, Producer, Executive Producer Patrick McGoohan John Drake Actor, Director Barbara Steele Cleo Actor Donald Houston Bill Vincent Actor Glyn Houston Wykes Actor Errol John Dessiles Actor John Phillips Dr. Brajanska Actor Earl Cameron Darcy Actor David Hutcheson Sir Alan Grose Actor T.P. McKenna Ivan Actor Clifton Jones Lieut. Labaste Actor Peter Hughes Howes Actor Jack Allen Colonel Actor Paul Danquah James Owen Actor John G. Heller Manuel Actor Fredric Abbott Callaghan Actor Christopher Carlos Victor N'Dias Actor Pearl Prescod Madame Celeste Actor Juliet Harmer Lady Kilrush Actor Dolores Mantez Mary Ann Actor Tommy Eytle Calypso Singer Actor Donald Johnson Writer Michael Truman Director Edwin Astley Music Don Chaffey Director Wilfred Greatorex Writer Charles Crichton Director Jacques Gillies Writer Malcolm Hulke Writer P.F. Sloan Music Sidney Cole Producer Louis Marks Writer Steve Barri Music Barry Delmaine Associate Producer Peter Yates Director Philip Broadley Writer