Astley wrote two arrangements of his own theme for "The Saint", a slow version used in the black and white episodes and a more up-tempo arrangement of the same theme for the colour episodes. He then wrote a second theme, used in the second season of the colour episodes, based around Leslie Charteris' own theme music, which had previously been used in films and on radio. Charteris' theme would also open its main theme to "Return of the Saint" and would close its theme for its TV movies of "The Saint" which starred Simon Dutton (neither of which were composed by Astley); however, Astley's original "Saint" theme was chosen for the film of the same name.