The Blacklist (10pm, NBC) - After a chemical attack on a subway, Liz ( Megan Boone) and the FBI search for the man responsible. Liz reluctantly calls on Red ( James Spader) for his help after she finds her search for the next person on the blacklist, brilliant scientist Frederick Barnes (guest star Robert Sean Leonard), heading to a dead end.
Also on . . .
Hart of Dixie (8pm, CW) - Zoey wants the townsfolk to embrace Joel, so she signs him up to chaperone a camp outing with her, but he backs out.
Bones (8pm, Fox) - Brennan and Booth's honeymoon in Buenos Aires turns into a busman's holiday when they help a detective, who's a fan of Brennan's books, investigate the murder of a Nazi war criminal whose remains were found in a mass grave.
Mike and Molly (9pm, CBS) - In the Season 4 premiere, Molly makes a monumental decision about her teaching career.
Tales from the Organ Trade (9pm, HBO) - A documentary looking at the black-market industry for the trafficking of human organs profiles the brokers, surgeons and poor people who sacrifice their bodies for money, as well as the patients who face moral and legal dilemmas in last-ditch attempts to prolong their lives.
Mom (9:30pm, CBS) - Christy clashes with Luke's conservative parents and Bonnie battles menopause.
Castle (10pm, ABC) - Alexis believes that a death-row inmate was wrongly convicted, so she seeks investigative assistance from her dad. However, they only have 72 hours to reexamine the original murder case before the inmate's scheduled execution.