Sam Elliott ("Tombstone," "Ghost Rider") and Garret Dillahunt ("Deadwood," "Terminator: The Sarah Connor Chronicles ") have joined the cast of the sixth and final season of FX's "Justified" which begins airing in January. Elliott plays Markham, a legendary Kentucky gangster who returns from exile with a private army, a lot of cash, and a determination to win back his empire and lost love Katherine Hale (Mary Steenburgen).