Extreme Weight Loss (8pm, ABC) - A 470-pound man and his 298-pound twin sister attempt to shed weight in the Season 3 premiere.
In Performance at the White House: Carole King (8pm, UNC-TV) - President Obama presents Carole King with the Gershwin Prize for Popular Song -- King is the first woman to win the prize -- at a White House event featuring performances by the honoree as well as James Taylor, Billy Joel and Trisha Yearwood. Dust off the ole "Tapestry" and get ready.
Constitution USA with Peter Sagal (9pm, UNC-TV) - The final installment examines the reasons for the longevity of the Constitution and the forces that threaten to undermine the vision of the framers, including excessive partisanship, money in politics and gerrymandering.
Reaper Reunion Special (9pm, FearNet) - A reunion of the cast members of the canceled-too-soon CW series "Reaper." FearNet will start rerunning episodes of the series next week in this spot.
Brooklyn DA (10pm, CBS) - The first episode in a six-part documentary series that offers a candid look at life inside the Kings County District Attorney's Office in Brooklyn, as cameras follow prosecutors in and out of the courtroom. Tonight, an alleged pimp is charged with human trafficking, a high-tech undercover sting targets art thieves, and justice is sought for the family of a police officer killed in the line of duty.
Body of Proof (10pm, ABC) - In the series finale, Megan's father's exhumation uncovers more questions about what she always believed was a suicide, and her mother suggests she examine his patient files for clues about his death and that of a patient.
Frontline: Outlawed in Pakistan (10pm, UNC-TV) - Pakistan's justice system and cultural taboos are examined through the story of a teenage girl who accuses four men of gang-raping her and then takes her case to court.