The tribes merge; somebody returns from Exile Island; and Utahn Tyson Apostol continues to work his way closer to the million dollars - he hopes - on this week's episode of Survivor: Blood vs. Water (7 p.m., CBS/Ch. 2).Elsewhere on TV ...NBA (5:30 p.m., ROOT): Utah Jazz at Boston CelticsThe 47th Annual CMA Awards (7 p.m., ABC/Ch. 4): Brad Paisley and Carrie Underwood host.Revolution (7 p.m., NBC/Ch. 5): Charlie and her mother share a moment.The X Factor (7 p.m., Fox/Ch. 13): The 12 remaining contestants perform.Arrow (7 p.m., CW/Ch. 30): Oliver and the Canary are attacked by a trained killer.Criminal Minds (8 p.m., CBS/Ch. 2): The team investigates a series of strangulations.Law & Order: SVU (8 p.m., NBC/Ch. 5): A preschooler charges a vocal coach/TV personality with sexual abuse.NOVA (8 p.m., PBS/Ch. 7): A report on how science and technology is making stuff safer.The Tomorrow People (8 p.m., CW/Ch. 30): Stephan fails to keep his promise to Astrid.It's Always Sunny in Philadelphia (8 p.m., FXX): The gang tries to make amends on Thanksgiving. (Season finale)CSI (9 p.m., CBS/Ch. 2): Sanders is accused of framing a murder suspect seven years ago.Top Chef (11 p.m., Bravo): Contestants try to impress up-scale chefs.American Horror Story: Coven (11 p.m., FX): Fiona and Myrtle battle over control of the coven.Key & Peele (11:30 p.m., Comedy Central): A football player is penalized for excessive celebration.