In the first installment Hatfields & McCoys (10 p.m., History), a three-part dramatic series about the most famous feud in America, a Hatfield murders a McCoy and sets things in motion.
The cast of this docudrama includes Kevin Costner, Bill Paxton, Tom Berenger, Powers Boothe, Mare Winningham and Jena Malone.
Elsewhere on TV ...
The Bachelorette (7 p.m., ABC/Ch. 4): The competition for Emily's heart continues, and Utahn Jef Holm is still in the running.
America's Got Talent (7 p.m., NBC/Ch. 5): Auditions in Tampa.
American Ninja Warrior (8 p.m., NBC/Ch. 5): The Midwest finals.
Gene Simmons Family Jewels (10 p.m., A&E): Gene and Shannon adjust to being married. (Season premiere)
Cake Boss (10 p.m., TLC): Buddy makes a cake for Carlo's first birthday. (Season premiere)