The Professionals was a British crime-action-drama that aired from 1977 to 1983. It starred Martin Shaw, Lewis Collins and Gordon Jackson, as agents of the fictional "CI5".
The series was conceived as a response to The Sweeney.
The Professionals was created by Brian Clemens, who had been one of the driving forces behind The Avengers. Clemens and Albert Fennell executive produced, with business partner Laurie Johnson providing the theme music. Sidney Hayers produced the first series in 1977, and Raymond Menmuir the remainder.
It was often criticized for violenceone of its first-season episodes ('Klansmen') was banned in the UK during its original run.
After the series ended, Raymond Menmuir produced Special Squad for Australia's Network Ten in the mid-1980s, following The Professionals format. A revival series, CI5: the New Professionals, was produced in the late 1990s and starred Edward Woodward, but it was not a success.