Ian Kennedy Martin (born 23 May 1936) is a British television scriptwriter who created the action drama series The Sweeney (1975–78).
In 1971 he worked on the popular BBC drama series The Onedin Line, which ran for nine years until 1980.
He is best known for creating the popular police action drama series The Sweeney,[2] produced by Euston Films for Thames Television, which ran on the ITV network from 1975 to 1978.
On 9 March 2009, his first play, The Berlin Hanover Express premiered at the Hampstead Theatre in North London.
He is the younger brother of the scriptwriter Troy Kennedy Martin (Z-Cars, Edge of Darkness), with whom he worked on Redcap.