From Wikipedia:
Ruby and Oswald is a 1978 made for television film about the assassination of U.S. President John F. Kennedy. It stars Michael Lerner and Frederic Forrest.
Jack Ruby (Michael Lerner) is a warm-hearted and patriotic nightclub owner, who loves President Kennedy. Lee Harvey Oswald (Frederic Forrest), a troubled loner with a speckled past is looking to merely acquire fame for killing the president.
Cast:
Michael Lerner as Jack Ruby
Frederic Forrest as Lee Harvey Oswald
Lou Frizzell as Captain J. Will Fritz
Doris Roberts as Eva
Lanna Saunders as Marina Oswald
Bruce French as Robert Oswald
Sandy McPeak as District Attorney Wade
Sandy Ward as Jesse Curry
Brian Dennehy as George Paulsen
Michael Pataki as Ike Pappas
Richard Sanders as Agent Kelley
Gordon Jump as Clyde Gaydosh
Gwynne Gilford as Little Lyn
Hillel Silverman as Himself
Jim Leavelle as Himself