30 Rock (8pm, NBC) - Political satire at "TGS" drives a wedge between Liz and Jack. Elsewhere, Liz and Criss spice up their relationship, and Jenna is demoralized by the sluggish sales of her summer dance song.

Last Resort (8pm, ABC) - A search for three missing crew members leads Chaplin to Serrat's compound. Meanwhile, Sinclair and Shepard hold a secret meeting.

The Vampire Diaries (8pm, CW) - Season 4 begins with Elena (Nina Dobrev) waking up after her car accident and realizing she died with vampire blood in her system. Now she must go through the horrible transition to become a vampire, or she must die.

Beauty and the Beast (9pm, CW) - In this retelling of the classic fairy tale, a homicide detective teams with a man who takes on incredible but uncontrollable strength when he's enraged. Adrienne reviews.

Vice Presidential Debates (9pm) - The debate between Vice President Joe Biden and Rep. Paul Ryan, live from Danville, Kentucky, will air on ABC, CBS, NBC, UNC-TV, Fox, Fox News, MSNBC and CNBC.

Project Runway (9pm, Lifetime) - In part 1 of the 2-part finale, the remaining contestants return from hometown visits to present three looks to judges.

It's Always Sunny in Philadelphia (10pm, FX) - In the eighth season premiere, Dennis and Dee must make a life-or-death decision about their ailing grandfather. Meanwhile, Mac, Charlie and Frank discover that the old man used to be a Nazi.

The League (10:30pm, FX) - In the fourth season premiere, preparations are made for the arrival and Kevin and Jenny's baby, and Taco is invited to the Dallas Cowboys' training camp.

Brand X With Russell Brand and Totally Biased With Kamau Bell also return to FX tonight, at 11 and 11:30 respectively.

SNL Primetime Election Special (8pm, NBC) - With Jay Pharaoh's new Obama impersonation and Jason Sudeikis rocking the the Mitt Romney, this should be an interesting half hour.

Up All Night (8:30pm, NBC) - In the premiere of a retooled Season 2, "The Ava Show" gets canceled, putting a strain on Ava and Reagan's relationship. Meanwhile, Chris decides to go back to work, and Reagan hires her brother to help remodel a bathroom.

The Office (9pm, NBC) - In the ninth and final season opener, two young employees arrive at the office and staffers immediately label them the new versions of Jim and Dwight. Also, Oscar mulls adopting Angela's cat and Kevin saves a turtle. As bad as this show had gotten over the past season or two, I still think this final run will be worth watching.

Project Runway (9pm, Lifetime) - The designers visit Radio City Music Hall and create  costumes for the legendary Rockettes. Debra Messing is the guest judge.

Parks and Recreation (9:30pm, NBC) - Leslie and Andy visit Ben and April in Washington, D.C., in tonight's Season 5 opener. Sens. John McCain, Barbara Boxer and Olympia Stowe have cameos (McCain's appearance is especially funny). Back in Pawnee, Ron hosts a barbecue for the P&R staff. I won't win any popularity contests for saying this, but Ron's "meat lover" shtick is starting to feel old to me. Ditto for whatever it is that Rob Lowe is doing. Still love the show, though!

Don't Divorce Me! Kids' Rules for Parents on Divorce (9:30pm, HBO) - Children talk about divorce and offer advice for parents to make sure kids are not manipulated, forgotten or mistreated when the time for permanent separation comes.

Wilfred (10pm, FX) - In the second season finale, existential questions are posed to Wilfred and Ryan.

Awkward (10:30pm, FX) - In the Season 2 finale, Jenna prepares for her trip to Europe as her decision about the boys goes public.

America's Got Talent (8pm, NBC) - A winner is named in the Season 7 finale. Justin Bieber performs (see the Biebs again at 10 on "Rock Center").

Glee (9pm, Fox) - Season 4 begins with Rachel (Lea Michele) moving to New York City to attend NYADA, where she meets an attractive older student (Dean Geyer, right). Back at McKinley, the glee club seeks new recruits, including Puck's half brother. Kate Hudson guest stars.

Project Runway (9pm, Lifetime) - The designers create their own fabric for fashions and receive visits from their families.

Extreme Chef (10pm, Food) - The final three chefs battle in the jungles of Thailand for the $50,000 grand prize in the Season 2 finale. They work with elephants and members of a native tribe before climbing hundreds of stairs to create the perfect bite in front of a Buddhist temple.

Rock Center with Brian Williams (10pm, NBC) - Nancy Snyderman examines internet dependency and studies that equate it with drug or alcohol addiction. Also, an interview with pop star Justin Bieber.

Sullivan & Son (10pm, TBS) - In the Season 1 finale, a coworker files and HR complaint against Hank for making "inappropriate comments" (which should have been the name of this series).

Louie (10:30, FX) - In the second of a three-part "Late Show" arc, Louie continues his adventure in California while mulling an offer to host "The Late Show" after Letterman's retirement.

Republican National Convention - Primetime convention coverage of the final night of the convention begins at 10 p.m. on broadcast networks. If you want wall-to-wall coverage, your best bet is to head online or to cable. Tonight's highlight will be the acceptance speech of presidential nominee Mitt Romney. Here's much more information about RNC viewing.

Iron Men (9pm, The Weather Channel) - Season two opens with workers who rebuilt the World Trade Center in New York City. A second episode airs at 9:30.

Project Runway (9pm, Lifetime) - In this time of national division, I'm glad we can all at least come together in our disdain for Ven Budhu, the most horrible human being to ever disgrace The Runway. Too harsh? No. What a supremely arrogant jack@ss. Anyway, tonight the designers compete to have their looks selected as part of a 10-piece capsule collection (hope they like silk and chiffon, Ven!). Fashion executive Bonnie Brooks is the guest judge.

Wilfred (10pm, FX) - Ryan attempts to discover the truth about Wilfred  through self-examination.

Louie (10:30pm, FX) - In the first episode of a three-episode arc, Louie hopes to catch a break.

Totally Biased with W. Kamau Bell (11pm, FX) - Bell riffs on politics, race and society. Solidly funny every week.

Project Runway (9pm, Lifetime) - The designers create looks to accompany new hairstyles for everyday women who are in need of makeovers. That means, this is the episode where designers have to design for non-boney women with average bodies, and they all pitch hissy fits and make the women cry. British fashion designer Alice Temperly is guest judge.

Burn Notice (9pm, USA) - The gang travels to Panama in the season finale, but their target discovers their plans and sets a trap.

Anger Management (9:30pm, FX) - In the first season finale, a seemingly innocent gesture leads Charlie and Kate to examine their relationship.

Suits (10pm, USA) - In the season finale, a personal tragedy causes Mike (Patrick J. Adams, right) to drop off the grid when Harvey (Gabriel Macht, right) needs him during the fight for the firm.

Rookie Blue (10pm, ABC) - Andy and Nick cross paths with a powerful drug dealer while investigating a death threat aimed a priest. Meanwhile, Chris and Swarek argue over what it takes to be a good cop.

Louie (10:30pm, FX) - Louie goes on a search for a lost love and then looks for his daughter.

Awkward (10:30pm, MTV) - Jenna struggles with her complicated love life, and an unexpected text message makes things even worse.

2012 Summer Olympics (NBC) - You can check to see when and where games are playing on the NBC Olympics schedule page. Highlights include track and field, women's diving, men's beach volleyball finals and Ashton Eaton and Trey Hardee competing for the decathlon. Tips on watching the Olympic games.

Project Runway (9pm, Lifetime) - In the wake of one contender's startling departure, the designers must seamlessly create day-to-evening outfits for women. Hayden Panettiere is the guest judge.

Burn Notice (9pm, USA) - Michael sets up his own arrest by the FBI as part of a plot to take down a Boston mobster. Elsewhere, Jesse and Pearce resort to blackmail to gain information on a gun sale.

Martian Mega Rover (10pm, NGC) - From drawing board to launch pad: Filmmaker Mark Davis documents the development of NASA's Mars rover Curiosity at the Jet Propulsion Laboratory in Pasadena, California, and the November 26, 2011, launch of the craft, which landed on the red planet this week.

Rookie Blue (10pm, ABC) - A serial killer is suspected when a missing girl's body is discovered in a ravine, but news of Andy's assault and Gail's abduction turns an already crucial investigation into a rescue mission.

Awkward (10:30pm, MTV) - Jenna is determined to take her relationship with Jake to the next level, but there are obstacles, including her Aunt Aly's wedding, a man from her mom's past, and a scheming Sadie.

Louie (10:30pm, FX) - Louie goes shopping with an old friend.

2012 Summer Olympics (NBC) - You can check to see when and where games are playing on the NBC Olympics schedule page. Highlights today include women's gymnastics, swimming, beach volleyball and rowing. The men's 200IM is expected to include the final duel between Michael Phelps (right) and Ryan 'Diamond Grill' Lochte. More tips on watching the Olympic games.

Burn Notice (9pm, USA) - Sam helps his girlfriend's son out of a bind with a cutthroat loan shark. Elsewhere, Michael and Fiona hunt down the person who sabotaged Michael's last mission.

Project Runway (9pm, Lifetime) - The designers spin out clothes for the Emmy Awards, with former "Project Runway" contestants returning to serve as their clients.

Great Lake Warriors (10pm, History) - A million pounds of cargo are threatened when two storms collide on Lake Michigan, and a captain navigates his way through a graveyard of wrecked ships.

Louie (10:30pm, FX) - Louie's day is ruined by a troublesome kid.

Awkward (10:30pm, MTV) - Still reeling from Jake's proclamation of love, Jenna considers sleeping with him, believing sex might bring her some clarity about her own feelings.

Duets (8pm, ABC) - A winner is announced in the Season 1 finale, after the professionals and their amateur partners perform one last time.

Project Runway (9am, Lifetime) - A brand new season with 16 new designers begins tonight. Heidi Klum, Nina Garcia and Michael Kors all return as judges, and guest judges this season will include Lauren Graham and Patricia Feld. And Tim Gunn is back as mentor, of course.

Saving Hope (9pm, NBC) - Routine surgery takes a nightmarish course when Alex's patient falls into a coma. Before long, Charlie connects with the coma patient in the spirit world.

Burn Notice (9pm, USA) - Michael takes on a gangster with help from an unlikely ally, and Card offers Fiona a deal to become a CIA assett -- an arrangement that would prevent her from being extradited.

Anger Management (9:30pm, FX) - Charlie learns that his new love interest, Lori (Denise Richards), thinks therapy is a scam. Meanwhile, Charlie is asked to counsel one of his patient's mother's angry ghost.

Rookie Blue (10pm, ABC) - An alleged psychic aids the search for a missing witness.

Sullivan & Son (10pm, TBS) - The premiere of a new sitcom about a corporate attorney who gives up his job and buys out his family's Pittsburgh-based bar on a whim. Two episodes tonight. Astonishingly not funny.

Louie (10:30pm, FX) - In part one of two parts, Louie searches for love with an eccentric bookseller played by Parker Posey.

Community (8pm, NBC) - Jeff is debilitated by his narcissism, which skyrockets when his confidence is boosted by anti-anxiety drugs and regular visits to a shrink. Also, the gang try to help Abed pay of his debt from a celebrity-impersonator habit. Also tonight, two new episodes of "30 Rock" (the 9:30 ep has Weird Al Yankovich) and a new "Up All Night" featuring Henry Winkler as Ava's dad.

Missing (8pm, ABC) - In the second episode of Ashley Judd's "special gift to America" (her own description of this series from a "Live with Kelly" interview), Becca makes a deal with the head of French Intelligence while searching for her missing son. Believe it or not, I'm still not a fan of this show even after Judd called me a "brat" on Twitter. 

Touch (9pm, Fox) - Fox previewed this episode of the new Keifer Sutherland (left) drama back in January, but it starts for real tonight. Possibly the same episode from the preview but record it anyway, just in case.

Project Runway All Stars (9pm, Lifetime) - A winner is picked in the season finale, and Tommy Hilfiger appears as a guest judge.

Awake (10pm, NBC) - A purported suicide during a high-end yacht party leads Michael to an encounter with Rex's ex-babysitter, Kate. In his other realm, Michael happens upon Kate again, but this time she appears as a suspect.

Archer (10pm, FX) - In the conclusion of the Season 3 finale, Archer and his ISIS colleagues travel to the final frontier to prevent a catastrophe aboard the International Space Station.

Missing (8pm, ABC) - Becca Winstone, played by Ashley Judd, is a former CIA operative who searches for her son when he disappears while studying abroad in Italy. I wish this was better than it is. I really do. Here's my review.

Community (8pm, NBC) - It's back! Andre (Malcolm Jamal Warner) and Shirley plan to remarry, throwing Annie and Britta into wedding-planning mode. Meanwhile, Jeff prepares a wedding speech and Troy and Abed practice acting normal. All NBC comedies are new tonight.

The Vampire Diaries (8pm, CW) - Damon recalls murders from 1912 that are eerily similar to a present-day crime spree. Meanwhile, Elena and Matt try to prove that Dr. Fell is a killer.

Project Runway All-Stars (9pm, Lifetime) - In part one of the two-part season finale, the final three designers race against time to spin out their signature lines for a red carpet VIP show.

Awake (10pm, NBC) - Michael's parallel realities begin spinning into chaos when his son is kidnapped by an on-the-lam convict who has a connection to Michael's past. In his other dimension, Michael searches for a missing teenage boy. Developments in both worlds cause others to doubt his sanity.

Archer (10pm, FX) - In part one of the Season 3 finale, Archer and his ISIS colleagues boldly go to the final frontier to prevent a catastrophe aboard the International Space Station.

Jersey Shore (10pm, MTV) - In the Season 5 finale, Mike starts a rumor about Denna's sister and Pauly and Vinny pull another prank on the roommates.