TV fans of “Lost” are already in mourning.

Tonight, it’s now the series endings for Fox’s “24″ and NBC’s “Law & Order.” (Both have possible films slated so all is not lost, so to speak.)

And several of America’s highest rated shows are closing shop for the spring: “NCIS,” “NCIS: Los Angeles,” “The Good Wife,” “American Idol,” “Two and a Half Men,” “The Big Bang Theory,” “Dancing With the Stars,” “The Biggest Loser,” “Criminal Minds” and “CSI: Miami.” All those shows draw at least 10 million viewers.

Two popular summer shows immediately launch as well: “So You Think You Can Dance” on Fox and “The Bachelorette” on ABC.

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MONDAY
“24″ 8 p.m. Fox (series finale) — Maybe Jack Bauer can relax now that vengeance is served.
“Chuck” 8 p.m. NBC (third season two-hour finale) — The Ring closes in on Chuck.
“Dancing With the Stars” 8 p.m. ABC — Nicole Scherzinger can close the deal tonight.
“How I Met Your Mother” 8 p.m. CBS (fifth season finale) — Is a baby in the cards for Marshall and Lily?
“The Bachelorette” 9 p.m. ABC (sixth season debut) — Ali Fedotowsky dropped Jake for a job in the spring. Now she can start over.
“Two and a Half Men” 9 p.m. CBS (seventh season finale) — Charlie Sheen has signed on for two more seasons. Stacy Keach and John Amos guest.
“The Big Bang Theory” 9:30 p.m. CBS (third season finale) — Mayim Bialik (“Blossom”) guests as Sheldon’s ideal woman.
“Law & Order” 10 p.m. NBC (series finale) — Twenty years later, NBC cuts the cord on this sturdy drama. Lupo and Bernard try to stop a possible school bombing.
“CSI: Miami” 10 p.m. CBS (eighth season finale) – A serial killer taunts the CSI team with puzzles.
TUESDAY
“American Idol” 8 p.m. Fox — Crystal Bowersox, the presumed frontrunner, and Lee DeWyze, the more mainstream rocker, face off.
“The Biggest Loser” 8 p.m. NBC (ninth season finale) — America decides whether Koli or Daris make it to the final three. (Daris gained weight while prepping for a marathon.)
“NCIS” 8 p.m. CBS (seventh season finale) — Gibbs heads to Mexico to face his demons.
“Dancing With the Stars” 9 p.m. ABC (two-hour 10th season finale) — The ugly trophy will likely go to Nicole Scherzinger but Evan Lysacek can’t be counted out.
“NCIS: Los Angeles” 9 p.m. CBS (first season finale) — The team searches for a woman who knows about Callen’s past.
“The Good Wife” 10 p.m. CBS (first season finale) — Will Alicia stand by Peter or pursue Will?
“Parenthood” 10 p.m. NBC (first season finale) — Crosby has to decide to move to New York with his new family.
WEDNESDAY
“American Idol” 8 p.m. Fox (ninth season finale) – Fox will give Simon Cowell a lovely send off, for sure. Atlanta’s Larry “Pants on the Ground” Platt will perform his hit song. And either Crystal or Lee will take the crown on what has been a lackluster season.
“Criminal Minds” 9 p.m. CBS (sixth season finale) – Tim Curry (”Rocky Horror”) plays a serial killer.
“CSI: NY” 10 p.m. CBS (sixth season finale) – Serial killer Shane Casey targets Danny.
“Top Chef Masters” 10 p.m. Bravo – Chefs play “Name that ingredient.” And they must create dishes inspired by the Greek Gods.
“Tyler Perry’s House of Payne” 10 p.m. TBS – Calvin’s two job schedule makes it hard for him to spend time with Miranda.
“Worst-Case Scenerio” 10 p.m. Discovery – Bear Grylls deals with life when his truck breaks down in a desert.
THURSDAY
“FlashForward” 8 p.m. ABC (series finale) – A promising pilot led to dull characters and muddled mythology. “Lost” this was not.
“So You Think You Can Dance” 8 p.m. Fox (two-hour seventh season debut) -
A dozen former participants will return and be paired with 10 newcomers (instead of the usual 20.)
“100 Questions” 8:30 p.m. NBC (new series) – Charlotte fills out a 100-question on-line dating survey and recounts a humorous anecdote based on each question.

“Hollywood Salutes Matt Damon” 9 p.m. ABC – How do you like them apples?
“Build it Bigger” 9 p.m. Science (fourth season finale) – Switzerland builds the world’s longest tunnel through the Alps.
“Mall Cops: Mall of America” 10 p.m. TLC (new series) – Thanks, Paul Blart. This is all your fault!
“The OCD Project” 10 p.m. VH1 (new series) – A group of OCD patients living together, guaranteeing conflict and much (literal) hand-wringing.
FRIDAY
“Past Life” 8 p.m. Fox – Fox burns off remaining episodes of this already canceled drama, which was shot in Atlanta.
“Wife Swap” 8 p.m. ABC – A family that prizes etiquette and elegance for their daughters trades wives with a family with mud-racing tomboys.
“Friday Night Lights” 8 p.m. NBC – Tami and the boosters clash.
“How It’s Made” 9 p.m. Science – Find out how to make an alligator bag, a locker and a bench plane.
“The Soup: 20 Years of Takin’ Some E!” 10 p.m. E! – Joel McHale mocks the best of E!-related clips.
“Friday Night Alright: Kanye West” 11 p.m. VH1 – West hasn’t been seen much lately since the Taylor Swift snafu. Here he is in concert in London.
WEEKEND
“The Special Relationship” 9 p.m. Saturday HBO – Bill Clinton (Dennis Quaid) and Tony Blair (Michael Sheen) forge a special relationship after Blair becomes Britain’s prime minister in 1997.
“Food Network Challenge: All Star Grill-Off” 8 p.m. Sunday Food – Six Food Network stars, split in two teams, battle for $10,000 for their favorite charity.
“National Memorial Day Concert” 8 p.m. Sunday GPB – A tribute to the military featuring Lionel Richie, Brad Paisley and Yolanda Adams.
“Chefs Vs. City” 9 p.m. Sunday Food (second season finale) – Chefs Daisy Roman and David Rosenberger of Kitchen 24 in Los Angeles are the challengers.
“Breaking Bad” 10 p.m. Sunday AMC – Walt’s concerned as Skyler gets more involved in his business.
“Basketball Wives” 10 p.m. Sunday VH1 (first season finale) – Everyone gets teary at a dinner.
“What Chilli Wants” 10:30 p.m. Sunday VH1 (first season finale) – Picky Chilli must choose between two guys – or nobody at all.
“The Boondocks” 11:30 p.m. Sunday Adult Swim – The Stinkmeaner is back to harass the Freemans.