In this two-hour installment, there's an epic showdown as two "Survivor" legends set their sights on one another. Two other contestants try to put their past behind them and start a new game. And another castaway introduces the "spy shack" 2.0.
Elsewhere on TV …
• NBA (6 p.m., ROOT): Utah Jazz at Houston Rockets
Elsewhere on TV ...
• "The Goldbergs" (7 p.m., ABC/Ch. 4): Barry is kicked out of the JTP; Adam's foul mouth prompts Beverly to start a swear jar.
• "Lethal Weapon" (7 p.m., Fox/Ch. 13): Riggs and Murtaugh team up with a DEA agent to gain information on new cartel operations.
• "Major Crimes" (7 and 8 p.m., TNT): A murder case goes sideways at trial when a defense attorney is able to destroy Detective Sykes' credibility on the stand.
• "Speechless" (7:30 p.m., ABC/Ch. 4): Against her wishes, Maia throws a birthday party for Dylan.
• "Modern Family" (8 p.m., ABC/Ch. 4): NBA stars Charles Barkley and DeAndre Jordan attend a charity basketball game Phil is playing in; Claire tries to keep a work mistake secret from Jay.
• "Star" (8 p.m., Fox/Ch. 13): Star and Hunter take their relationship to the next level; there's an arrest in Otis' murder.
• "TIME: The Kaleif Browder Story" (8 p.m., Spike): A look at the early days of Kalief's incarceration at Rikers Island, where he gets introduced to a world of violence, corruption and gangs.
• "Black-ish" (8:30 p.m., ABC/Ch. 4): When Bow tries to get a black doll for Diane, she's dismayed by the limited options.
• "Doubt" (9 p.m., CBS/Ch. 2): Sadie interviews Billy's ex-classmates in hopes of finding a key piece of evidence and defends her childhood best friend in a probation violation case.
• "Designated Survivor" (9 p.m., ABC/Ch. 4): The series returns after a three-month hiatus: The nation reels from the aftermath of the shooting.
• "Duck Dynasty" (10 p.m., A&E): Rowdy's adoption is finalized; Jase enjoys his first massage more than he expected.
• "The Magicians" (10 p.m. Syfy): Julia and Kady enlist Quentin, Margo, Eliot, and Penny for a magical heist.
• "Workaholics" (11 p.m., Comedy Central): The guys try to get rid of a motivational speaker.
• "The Quad" (11 p.m., BET): On the heels of Sydney's rape allegation, President Fletcher and Coach Hardwick search for the truth.
• "Six" (11 p.m., History): The team finally comes face-to-face with Michael and his jihadist soldiers. (Season finale)
• "It's Always Sunny in Philadelphia" (11 p.m, FXX): Dennis reveals that he has a baby from his layover time in North Dakota. (Season finale)
• "The Expanse" (11 p.m., Syfy): Preparations for the Earth/Mars peace conference tighten the tension on Erringwright.
• "Jeff & Some Aliens" (11:30 p.m., Comedy Central): The aliens give Jeff an ultimatum and threaten to destroy Earth..
• "Legion" (11 p.m., FX): David faces a new threat.
• "Underground" (11 p.m., WGN): The remaining members of the Macon 7 escape to the North, but they learn that freedom is not as simple as crossing a line.
• "Man Seeking Woman" (11:30 p.m., FXX): Josh and Lucy get married. (Season finale)