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One excellent series ends its season tonight; a very good three-part sci-fi miniseries begins; and a promising new sci-fi series kicks things off.

• Season 2 of "Fargo" (11 p.m., FX) comes to a close … and, given that each season is a completely separate story, it brings this narrative to an end. In thie finale, Peggy and Ed try to escape.

• "Childhood's End" (9 p.m., Syfy) is a three-part adaptation of Arthur C. Clarke's classic sci-fi novel, and the show holds true to the spirit of the book — although there have been some changes. In Part 1, alien Overlords arrive on Earth to guide humans to a golden age — but do they have an ulterior motive?

It continues on Tuesday and concludes on Wednesday. And you can read a lot more about "Childhood's End" if you click here.

• And "The Expanse" (11 p.m., Syfy) is a new sci-fi series set in the 23rd century that starts out a bit slow, but give it a chance. I've seen four episodes, and I'm anxious to see more. This is also based on a series of novels, and begins with the search for a missing woman and an attack on a space freighter that signal a massive conspiracy that could lead to war.

Episode 2 airs Tuesday at 11 p.m., the series' regular time slot.

Oh, and there's a Mormon-related subplot that begins in Episode 3 and picks up in Episode 4. And click here for much more about that.

Elsewhere on TV ...

• NBA (6:30 p.m., ROOT): Utah Jazz at San Antonio Spurs

• NFL (6:15 p.m., ESPN): New York Giants at Miami Dolphins

• "Supergirl" (7 p.m., CBS/Ch. 2): Kara faces off with her super/evil aunt; Cat may lose control of CatCo after a hacker exposes her private emails.

• "The Great Christmas Light Fight" (7 p.m., Ch. 4): Three neighborhoods from across the country compete for a $50,000 prize.

• "The Voice" (7 p.m., NBC/Ch. 5): The finalists perform. A winner will be declared on Tuesday.

• "Major Crimes" (7 and 9 p.m., TNT): A professional baseball player's daughter vanishes.

• "Scorpion" (8 p.m., CBS/Ch. 2): On Christmas Eve, Team Scorpion must prevent a catastrophe when torrential rains create a large crack in a dam.

• "Jane the Virgin" (8 p.m., CW/Ch. 30): Mateo celebrates Christmas for the first time, but his parents are at odds concerning the holiday.

• "Legends" (8 and 10 p.m., TNT): Martin prepares Kate for a perilous mission in Paris.

• "NCIS: Los Angeles" (9 p.m., CBS/Ch. 2): A suspected North Korean spy is murdered.

• "The Great Holiday Baking Show" (9 p.m., ABC/Ch. 4): It's pastry week, and the contestants have to create breakfast pastries, one of Mary Berry's fruity recipes, and an elaborate centerpiece made out of cream puffs.

• "Adele Live in New York City" (9 p.m., NBC/Ch. 5): Adele performs at Radio City Music Hall.