Who Do You Think You Are? (8pm, NBC) - Paula Deen visits her aunt in Georgia, who provides her with information that takes her back 150 years in her family’s history. As she digs deeper into her heritage she uncovers her ancestor’s political ties and his connection to a dark time in America’s history. Further exploration reveals a heartbreaking event that deeply impacted her ancestors during the Civil War. Unfortunately, this is the final episode of "Who Do You Think You Are," because NBC declined to renew for next season. Sadness.

Shark Tank (8pm, ABC) - The Season 3 finale includes an update on a site that sells VIP treatment at nightclubs and special events.

Nikita (8pm, CW) - The second season ends with Nikita and Michael invading Division to capture Percy.

Grimm (9pm, NBC) - The search for mysterious gold coins intensifies as the body count rises in Portland, and the arrival of a woman in black complicates matters for Nick and Hank in the Season 1 finale.

Supernatural (9pm, CW) - Season 7 concludes with Sam and Dean battling Leviathan Dick Roman and trying to stop him from carrying out his evil plans.

The Finder (8pm, Fox) - Walter's search for a missing husband and father, who is also sought by an FBI agent, hinges on a partial voice-mail recording of his last message to his family. Meanwhile, the case conjures up painful memories for Leo of his deceased wife and daughter.

The Ricky Gervais Show (9pm, HBO) - Topics for the third season premiere of this animated podcast include Karl's theory on museum collections, an invention for a mug coaster, and a fashion trend disappointment. Also, Karl's movie idea about a man whose brain is transplanted into Tom Cruise's body.

Supernatural (9pm, CW) - Sam and Dean reconnect with an old hunter friend who suddenly disappears in an abandoned house that is haunted by a powerful ghost.

Grimm (9pm, NBC) - Monroe and Rosalee hide a suspect in a string of murders from a creature bounty hunter.

In Plain Sight (10pm, USA) - Mary's fugitive father surfaces, putting Jinx and Brandi in danger and leaving Mary to wonder whom she can trust.

NCAA Basketball (CBS, TBS) - Friday's games begin at 7:15 on CBS and 7:47 on TBS. UNC plays at 7:47 on TBS and NC State tipoff will follow on TBS (expect the 10:30 p.m. area).

Who Do You Think You Are (8pm, NBC) - Oscar winner Helen Hunt investigates her paternal ancestry on a voyage that leads her to San Francisco, where she ultimately unearths information about her great-great-grandmother's involvement in the fight for women's rights.

Shark Tank (8pm, ABC) - Pitches include beer flavored ice cream and packaged meals for pets.

Fringe (9pm, Fox) - A killer targeting love is investigated by the Fringe team as Peter tries to decide what to do about Olivia.

Supernatural (9pm, CW) - Lucifer drives Sam mad and he ends up in a mental hospital.

North Woods Law (9pm, Animal Planet) - A rookie warden reponds to a report deep in the woods of a dead deer hanging by a chain and missing a leg. GROSS. This is a new series about Maine Game Wardens. Last week's premiere episode airs right before this at 8.

In Plain Sight (10pm, USA) - Mary scrambles to find child care while working on a case in which a hoarder witnessed a violent murder.

Shark Tank (8pm, ABC) - Singer Ingrid Michaelson joins a would-be entrepreneur who's pitching high-tech music software. There's also a follow-up on this season's magnetic clip to secure eyeglasses.

Fairly Legal (9pm, USA) - In the Season 2 premiere, Kate returns to work and mediates a case between a corporation and a former employee, who claims he was exposed to harmful chemicals on the job.

Supernatural (9pm, CW) - Sam and Dean investigate after a ballerina dances herself to death, and their probe reveals that the ballet slippers the victim wore were cursed. When Dean accidentally touches them, the curse takes hold of him.

In Plain Sight (10pm, USA) - In the premiere of the 5th and final season, Mary (Mary McCormack, pictured here) returns from maternity leave (still can't believe Mary has a baby!) and encounters a new dynamic at the office. She's then assigned to protect a witness who could destroy a powerful secret society.

Merlin (10pm, Syfy) - Morgana joins forces with a warlord in a plot to topple Camelot. Meanwhile, Arthur prepares to marry a princess from a neighboring kingdom and Gwen finds herself in the warlord's lair.

Bering Sea Gold (10pm, Discovery) - As winter approaches, the short-staffed crew sets sail before they're blocked in by ice. Also an auction for next year's dredging grounds commences.

Who Do You Think You Are (8pm, NBC) - Season 3 of this genealogical reality show kicks off with Martin Sheen delving into his family's history. Sheen travels to Ireland and Spain, and discovers his uncle was also devoted to political activism and that another relative had been allegedly imprisoned in Spain.

Seizing Justice: The Greensboro 4 (8pm, Smithsonian Channel) - A repeat of the Smithsonian Channel documentary examing the sit-ins at the Greensboro Woolworth's lunch counter in 1960. More info here.

Supernatural (9pm, CW) - Sam and Dean investigate when bodies branded with a mysterious symbol turn up with their feet and hands severed.

Grimm (9pm, NBC) - Nick finds a black market that supplies the creature world with human organs. Also, he and Juliette befriend a pair of homeless siblings whose friends have vanished.

Blue Bloods (10pm, CBS) -  Danny and his family get caught in a crossfire after Danny's car hits a man fleeing from a gunman and Danny returns fire. Meanwhile, Frank deals with the impending loss of a friend he worked with at Ground Zero.

A Gifted Man (8pm, CBS) - Michael's clinic colleagues rush to operate on him after he exhibits signs of a dire condition requiring immediate medical attention.

Chuck (8pm, NBC) - Chuck and Sarah mull over the next phase of Carmichael Industries, while Casey gets  more deeply involved in his forbidden romance with Gertrude Verbanksi. Also, an intellectually elevated Jeff begins to scrutinize some of the crazy happenings at the Buy More.

Supernatural (9pm, CW) - Sam helps a teen girl search for her missing father, who is also a supernatural hunter. Meanwhile, Dean tries to take down Dick Roman (James Patrick Stuart).

Merlin (10pm, Syfy) - In the Season 4 premiere, Morgana summons Callieach to rip apart the fabric between the worlds of the living and the dead, unleashing creatures that kill anyone they touch. It's up to Arthur and the knights to save the kingdom while Merlin attempts to restore order to the world.

Blue Bloods (10pm, CBS) - Erin's informant is murdered and she blames herself for his death. So she teams up with Danny to find out who killed him.

Confessions: Animal Hoarding (10pm, Animal Planet) - A former rock musician's dogs may be more important to him that his own daughters, and a woman refuses to choose between her family and her 99 pets.

A Gifted Man (8pm, CBS) - Michael is surprised to see an ex-football star whom he once treated now getting help at the clinic because he's homeless.

Chuck (8pm, NBC) - The fifth and final season opens with Chuck (Zachary Levi, left) adapting to changes, such as dealing with an unlikely new Intersect and fronting his freshly minted spy-for-hire business. Carmichael Industries takes on a wealthy thief (Mark Hamill) and a sly investor (Craig Kilborn). Meanwhile, Morgan and Chuck team up to give Sarah a special surprise, and Jeff and Lester launch yet another scheme.

Grimm (9pm, NBC) - In the first episode of this strong new series following a detective who tracks fairy tale monsters, a university student is savagely attacked while jogging, and a mysterious woman visits her nephew to tell him a family secret. Read more in Adrienne's review.

Supernatural (9pm, CW) - Sam and Dean are cloned by two Leviathans who go on a killing spree as the two brothers, which lands the real Sam and Dean on the FBI's most wanted list. Meanwhile, Bobby tries to find a way to kill the Leviathans.

Fringe (9pm, Fox) - The threatening return of the translucent shape-shifters coincides with the reemergence of a former Massive Dynamic scientist (Arye Gross). Meanwhile, Walter gets a visit in the lab from Nina Sharp.

Blue Bloods (10pm, CBS) - Frank deals with a political crisis after Jamie and Renzulli are injured by a church security team that refuses to let them enter a religious center in response to a 911 call.

A Gifted Man (8pm, CBS) - Michael seeks Anton's assistance with a patient who is hearing voices. Meanwhile, Kate has a rough first day at the clinic.

Nikita (8pm, CW) - Nikita is shocked to learn that her old Division partner whom she thought was dead is alive, having escaped from a Turkish prison.  Nikita and Michael go to Turkey to fidn her before Alex and Roan get to her on orders from Amanda.

CSI: NY (9pm, CBS) - Danny and some rookie cops are caught up in a shooting when they go out for drinks after work. Joey McIntyre (at right, from New Kids on the Block) plays a man who may be involved.

Supernatural (9pm, CW) - Sam and Dean hut a vengeful Egyptian god who kills people for their sins. When they find him, he puts Dean on trial for his past mistakes and threatens to kill him if he is found guilty.

Fringe (9pm, Fox) - Walter is wary of leaving the sanctuary of his lab for the first time in  years when he and Olivia go to Massive Dynamic in New York to study old files after she discovers a powerful force that may be link to his Cortexiphan experiments.

Blue Bloods (10pm, CBS) - Erin reopens an 18-year-old rape case, in which Frank was the arresting officer. Meanwhile, Danny and Jackie investigate the murders of three teens in a park.

A Gifted Man (8pm, CBS) - In this series premiere, a top neurosurgeon (Patrick Wilson) begins receiving visits from the ghost of his ex-wife (Jennifer Ehle), who teaches him what's important in life. Shortly after her first visit, she asks him to help out at a low-income clinic where she worked. Thrilled that this also stars the great Margo Martindale, who most recently played Mags Bennett on "Justified." Adrienne approves.

Kitchen Nightmares (8pm, Fox) - In the Season 4 premiere, Chef Ramsay visits Blackberry's Catering and Family Restaurant in Plainfield, New Jersey, and explains that the quality of food and service both need to improve.

Nikita (8pm, CW) - In the Season 2 opener, Nikita and Michael are prepared to use the black box t otake down Division and Oversight, but Amanda, who's now in control of Division, has other plans.

Supernatural (9pm, CW) - Season 7 opens with Castiel assuming his new role as God and warning Sam and Dean to not interfere with him. Also, Sam struggles with the broken wall in his head.

Fringe (9pm, Fox) - The fourth season begins one week after Peter vanished, and as the two universes maintain an uneasy alliance, Lincoln Lee helps the Fringe team on a shape-shifting investigation that hits close to home.

Blue Bloods (10pm, CBS) -  Season 2 begins with a supporter of the new mayor being murdered and the mayor asking Frank to spin the story so it looks like a random act of violence. Meanwhile, Jamie gets his first undercover assignment. Bonus: Carrie Underwood and Tony Bennett sing "It Had to be You."

CSI: NY (9pm, CBS) -  The eighth season begins with Mac and the team recalling moments from 9/11 on the 10th anniversary of the tragedy.

Strike Back (10pm, Cinemax) - After the firefight at the arms deal exchange point, Tahir escapes to the desert with Clare as a hostage, and with Stonebridge and Crawford  in pursuit. As they close in and prepare for an assault, Crawford gets under Stonebridge’s skin and hints about a traitor within British Intelligence. A clip from tonight's show. And another.

Supernatural (8pm, CW) - Two back-to-back episodes close out the sixth season tonight. In the finale, the memory-blocking wall inside of Sam's head that keeps his darkest memories from him comes crashing down and he struggles to deal with the consequences.

Friday Night Lights (8pm, NBC) - Coach Taylor is praised in a popular magazine, a figure from Vince's past makes a demand, Luke digests the news about TMU, and Julie's return to college is delayed.

Flashpoint (8pm, CBS) - Mike fears his former mentor may be implicated in a case that involves corruption, drug dealers and an attempted gang execution.

Real Time with Bill Maher (10pm, HBO) - Amy Chua and Zach Galifianakis are the interview guests tonight. Last time Galifianakis was on the show, he made headlines when he lit up and smoked a joint to illustrate his point about the legalization of marijuana. He also discussed his uncle Nick Galifianakis' failed senate run against Jesse Helms. I'm sure he's on tonight to promote 'Hangover 2,' but with him, you never know what else might come up. Other guests include author Reza Aslan, commentator Dylan Ratigan, and journalist Gillian Tett.  

20/20 (10pm, ABC) - A report on infomercials and the "as seen on TV" products they promote. Includes interviews with celebrity product spokespersons and infomercial entrepreneur A.J. Khubani.