The “Ultimate BBQ Cookout Countdown” sounds like a tasty treat. It’s an extensive search that includes stops in Alabama, Texas, Connecticut and Tennessee. 8 p.m., ABC.
Beware of giant slugs. In the first of a two-part series finale of “Merlin,” Morgana and Mordred (Katie McGrath, Alexander Vlahos) use one of the creepy crawlers to rob hero (Colin Morgan) of his magic. 10 p.m., Syfy.
On the two-hour season finale of “Criminal Minds,” The Replicator returns and targets a member of the unit. That’s not nice at all. 8 p.m., CBS.
“The Bachelor’s Funniest Moments” is a new special that relives some of most startling confessions, embarrassing gaffes and not-so-rosy moments of both “The Bachelor” and “The Bachelorette.” 7 p.m., ABC.
“The Goodwin Games” is a new sitcom about three estranged siblings who learn they stand to make millions — but only if they can adhere to their late father’s wishes and complete a series of unusual challenges. 7:30 p.m., Fox.
Tracy Morgan hosts “The 2013 Billboard Awards,” an annual celebration of chart-topping artists. Among those scheduled to perform: Taylor Swift, Justin Bieber, Bruno Mars and Prince. 7 p.m., ABC.
DON'T MISS: "DANCING WITH THE STARS" - They came. They saw. They busted some moves. Now, the ballroom blitz comes to an end as our remaining hard-working couples finally learn who wins the Season 16 title - and who has to lug that hideous disco-ball trophy home. 8 p.m. Tuesday, ABC.
Ozzy Osbourne and Black Sabbath perform in the eerie season finale of “CSI.” Fortunately, no bats were harmed in the making of this episode. 9 p.m., CBS.
It’s time to bust a move as “So You Think You Can Dance” returns for its 10th season. The show kicks things off with the first half of a two-part opener. 7 p.m., Fox.
Five years of rebooted teen drama come to an end as “90210” signs off for good. The farewell episode features a performance by the Goo Goo Dolls and a cameo by Prince Michael Jackson. 7 p.m., The CW.
“Survivor: Caramoan — Fans vs. Favorites” comes to an end tonight and you know what that means: The person with the fewest knives in his/her back wins a million bucks. 7 p.m., CBS.
DON'T MISS: "THE OFFICE" SERIES FINALE - It began as a modest adaptation of a British classic and then came into its own. Now, after nine seasons of workplace insanity, the Dunder Mifflin gang bids farewell in a 1 hour-and-15- minute episode that figures to provoke both laughter and tears. H…
Don’t look now, but the Cybermen are back on “Doctor Who.” Our time-traveling hero (Matt Smith) unexpectedly runs into some of his oldest foes while visiting a dilapidated theme park. 8 p.m., BBC America.
Season 3 of “Blue Bloods” concludes as the Reagans go after a gang leader who killed someone close to them. 9 p.m., CBS.
You thought it would never happen, but on “Community,” Jeff (Joel McHale) has finally collected enough credits to graduate. Now, in the season finale, he ponders life after Greendale. 7 p.m., NBC.
“Don’t Say No Until I Finish Talking: The Story of Richard D. Zanuck” is an engaging profile of the highly successful film producer who died last year. Among those interviewed: Steven Spielberg, Johnny Depp, Clint Eastwood and Michelle Pfeiffer. 8:30 p.m., TCM.
Did “Splash” make much of one? Tonight, the strange celebrity diving competition comes to an end, but we’ll continue to wonder how it ever got on the air in the first place. 7 p.m., ABC.
“Rihanna 777” is a behind-the-scenes documentary that follows the songstress during a brief tour last November that had her doing seven shows over seven days in seven countries. 7 p.m., Fox.
“The Amazing Race” — All that panting and gasping you hear is coming from the final three teams as they chug toward the finish line in Washington, D.C. This still-enthralling reality series crowns another winner, but not before serving up some more rigorous challenges in Belfast, Northern Ir…
“Mr. Hockey: The Gordie Howe Story” is a film that recalls the NHL icon (Michael Shanks) who ended a brief retirement in 1973 — at age 45 — and later became the league’s only player to suit up in five different decades. 9 p.m., Hallmark Channel.
On “Nikita,” our leading lady (Maggie Q) stages yet another daring raid, because, well, daring raids are what they do on this show. 7 p.m., The CW.
Is “Scandal” about to get even crazier? In tonight’s episode, “some really big stuff” goes down at the White House as an action by the first lady (Bellamy Young) sends Cyrus (Jeff Perry) into crisis-management mode. 9:02 p.m., ABC.
Kal Penn (“House”) hosts “The Big Brain Theory: Pure Genius.” It’s a competition show that pits engineers against each other in a series of high-tech challenges, including one that involves explosives. 10 p.m., Discovery.
Amanda Knox breaks her silence in a special edition of “20/20” that has Diane Sawyer conducting an interview with the former American exchange student whose conviction for the 2007 murder of her roommate in Italy was overturned. 9:01 p.m., ABC.
On “How I Met Your Mother,” it’s time for Barney’s (Neil Patrick Harris) bachelor party. Of course, it will be legendary — as long as his mom (Frances Conroy) and Ralph Macchio don’t ruin his “bro mitzvah.” 7 p.m., CBS.
“THE GOOD WIFE” — Alicia Florrick (Julianna Margulies) agreed to renew her vows with Peter (Chris Noth), but she clearly still has Will (Josh Charles) on the brain as this drama closes out another superb season. Just what will she do? Meanwhile, the episode is mainly pegged to a voter-fraud…
DON'T MISS: "THE GOOD WIFE" - Alicia Florrick (Julianna Margulies) agreed to renew her vows with Peter (Chris Noth), but she clearly still has Will (Josh Charles) on the brain as this drama closes out another superb season. Just what will she do? Meanwhile, the episode is mainly pegged to a …
The amazing new game show, “Bet on Your Baby,” continues as parents challenge their little rug rats to do things like catch a beach ball and make animal sounds. Yes, people. That’s actually a show. 7 p.m., ABC.
Is this the end for “Happy Endings”? The sitcom closes out its season with back-to-back episodes, the first of which features quest appearances by Megan Mullally and Michael McKean. After that, the “bubble” show faces an uncertain future. 7 p.m., ABC.
On “The Vampire Diaries,” we get our first look at what could be a spinoff of the popular series. The “pilot” has Klaus (Joseph Morgan) heading for New Orleans on a tip that a cabal of witches is plotting to take him down.
Big, bearded Kahunas? On the season finale of “Duck Dynasty,” the Robertsons head off on a Hawaiian vacation. Just the thought of those dudes in swimwear makes us giggle. 10 p.m., A&E.
Tony and Ziva (Cote de Pablo, Michael Weatherly) fans should enjoy tonight’s episode of “NCIS.” The two share a slow dance while hunting her father’s killer in Germany. Can a major smooch be far behind? 7 p.m., CBS.
“Rectify” — Aden Young delivers an extraordinary performance in this riveting six-part drama about a man struggling to adjust to freedom after spending nearly 20 years on death row. When Daniel Holden, accused of murdering a teen girl, is released on new DNA evidence, he returns as an outsi…
“Remember Sunday” is a sweet new TV film about a lonely waitress (Alexis Bledel) who falls for a jewelry store clerk (Zachary Levi) despite his annoying forgetfulness. Turns out he suffered a brain aneurysm and his memory is virtually nonexistent, so every day is a new day. 8 p.m., ABC.
DON'T MISS: "RECTIFY" - Aden Young delivers an extraordinary performance in this riveting six-part drama about a man struggling to adjust to freedom after spending nearly 20 years on death row. When Daniel Holden, accused of murdering a teen girl, is released on new DNA evidence, he returns …
Hilary Swank and Brenda Blethyn star in the TV film “Mary and Martha.” It’s the story of two very different women who embark on a journey of self-discovery after traumatic events in Africa bring them together. 8 p.m., HBO.
Let’s try not to freak out the good residents of Portland, but in the latest episode of “Grimm,” a volcano threatens to bury the city in lava. 8 p.m., NBC.
What’s better than a new episode of “Parks and Recreation”? Two new episodes of “Parks and Recreation,” served up back-to-back. The TV gods must love us. 8 p.m., NBC.
“Deadliest Catch” launches a new season, which means more scenes of manly men braving frigid temperatures and the angry seas, all while we sip our lattes on the couch. 9 p.m., Discovery.
Let the game begin. “Defiance” is an epic new sc-fi drama set in 2046, when Earth has been invaded by seven alien races. Even better: The plots connect up with an interactive video game. 9 p.m., Syfy.
“Veep” — U.S. Vice President Selina Meyer (Julia Louis-Dreyfus) is back for another term of screwball politics as this hilarious sitcom returns for its second season. Of course, there are more fires to put out and more dysfunctional Beltway relationships to navigate. As usual, Selina finds …
DON'T MISS: "VEEP" - U.S. Vice President Selina Meyer (Julia Louis-Dreyfus) is back for another term of screwball politics as this hilarious sitcom returns for its second season. Of course, there are more fires to put out and more dysfunctional Beltway relationships to navigate. As usual, Se…
Louis C.K. takes the stage for his latest stand-up special, “Louis C.K.: Oh My God.” The show has him cracking wise on, among other subjects, the food chain, divorce, strange anecdotes, murder and mortality. 10 p.m., HBO.
The new, eight-part drama series, “Da Vinci’s Demons” springs from the mind of writer David S. Goyer (“Dark Knight Trilogy”). It’s a rollicking “historical fantasy” that chronicles the life of Leonardo da Vinci (Tom Riley) during his turbulent youth in Renaissance Florence. 10 p.m., Starz.
“The Moment” is an uplifting new reality series that gives people a second chance to experience their dream jobs. First up: A wannabe photographer interviews for a post at “Sports Illustrated.” 10 p.m., USA.
“Australia’s First 4 Billion Years: Awakening” is the latest offering from “Nova.” It’s a four-part series that takes viewers on an exhilarating journey from the Earth’s origins to the emergence of the world we know today.
Ready or not, here comes “Ready for Love.” It’s a new dating show that’s executive- produced by Eva Longoria and has three bachelors searching for their perfect mates with the help of a relationship expert. 8:01 p.m., NBC.
Never mind that your bracket is totally busted. The NCAA Basketball Tournament is down to the two survivors and it’s time to see who will experience that “One Shining Moment.” 6 p.m., CBS.