A winner will be declared in the season finale of The Biggest Loser (8 p.m., NBC/Ch. 5).We don't know who will win, but we know it won't be Utahn Hap Holmstead. He was eliminated several weeks ago - but he lost a ton of weight, so he's a winner.Elsewhere on TV ...NCIS (7 p.m., CBS/Ch. 2): A murder reveals a possible location for Parsa.Agents of S.H.I.E.L.D. (7 p.m., ABC/Ch. 4): The team goes under cover on a train headed for disaster.The Originals (7 p.m., CW/Ch. 30): There's a discovery at the cemetery.NCIS: Los Angeles (8 p.m., CBS/Ch. 2): Two private military contractors are murdered.The Goldbergs (8 p.m., ABC/Ch. 4): Erica sneaks out and ends up needing her mother to come to her rescue.American Experience (8 p.m., PBS/Ch. 7): Shunned former members of the Amish community talk about trying to adjust to life in modern America.New Girl (8 p.m., Fox/Ch. 13): Nick meets one of Jess' exes.Trophy Wife (8:30 p.m., ABC/Ch. 4): Kate and Jackie try to work together.Supernatural (8 p.m., CW/Ch. 30): Sam and Dean go under Cover at a spa.Cougar Town (8 and 10 p.m., TBS): Andy organizes a 5k to try to save his reputation.Brooklyn Nine-Nine (8:30 p.m., Fox/Ch. 13): It's Holt's birthday.Person of Interest (9 p.m., CBS/Ch. 2): Reese returns.Killer Women (9 p.m., ABC/Ch. 4): Molly hunts for a serial killer.Pretty Little Liars (9 and 11 p.m., ABC Family): Spencer tries to prove her theory.Ravenswood (10 p.m., ABC Family): In the season finale, Hanna arrives in town for a showdown with Miranda.Justified (11 p.m,. FX): A mob revenge plot descends upon Kentucky.