Killer on the Hill is the seventeenth episode of the fourth season of Cannon, and the ninetieth episode overall.
Guest Stars: Michael Tolan (John Wittig), Brooke Bundy (Cathy Caluso), Lawrence Pressman (David Elder), Ellen Weston (Margaret), George DiCenzo (Charles Caluso)
Co-Starring: Milton Selzer (Marty Kaufman), Bill Fletcher, Virginia Vincent, Sidney Clute, Ken Lynch (P.J. Delahanty), Bert Holland
With: William Bryant (Police Lieutenant), Lindsay Workman, Sam Edwards, Francis De Sales, James Chandler, Robert Cleaves, Jon Cedar, Jack Warford, Dani Nolan, David Dreyer, Richard DiSante
After a controversial politician is the victim of an assassination attempt, Cannon travels to Washington to clear a man accused of the crime and becomes in involved in political intrigue and murder.