The Professionals is a British crime-action
television drama series produced by Avengers Mk1 Productions and
London Weekend Television that aired on the
ITV network from 1977 to 1983. In all, 57 episodes were produced, filmed between 1977 and 1981. It starred
Martin Shaw,
Lewis Collins and
Gordon Jackson as agents of the fictional "CI5" (Criminal Intelligence 5, referencing the real life
MI5).