Along with a great many fabulous movies he starred in the Madigan TV series?
You're likely thinking of
Richard Widmark, a renowned American actor. While he was famous for his roles in films like "Kiss of Death," "The Street with No Name," and "Judgment at Nuremberg," he did not star in the TV series "Madigan." That series starred
Richard Harris as Detective Lieutenant Daniel Madigan.
Richard Widmark did have a successful career in television, appearing in miniseries and movies of the week throughout the 1970s and 80s.