The Simpsons (8pm, Fox) - When a beloved Springfielder dies, four residents recall life events that they would like to do over. Among them: Homer bemoans selling a tech stock to purchase a bowling ball, and Marge fears that she’s the reason Bart is such a rebellious child. Others wishing for a do-over are Mr. Burns, who recalls a long-ago romance with a lovely Parisienne, and newsman Kent Brockman wo regrets not leaving the local station to take a job with cable news. Update: “The Simpsons” will honor the late Marcia Wallace, who voiced Bart’s teacher Edna Krabappel, by re-airing one of her signature episodes, “The Ned-Liest Catch,” at 7:30 p.m. The 8 p.m. episode will then conclude with a tribute card from the producers honoring Wallace.
JFK: The Smoking Gun (8pm, Reelz) - Based on a book of the same name, this two-hour special probes the assassination of President John F. Kennedy with an emphasis on ballistic studies and eyewitness testimony -- and comes up with a pretty stunning declaration as to whom the author and filmmakers believe fired the fatal shot that killed Kennedy. There will be many, many repeats of this over the next few weeks. As far as conspiracy theories go, you can do much worse than this one. Read more about “JFK: The Smoking Gun.”
Revenge (9pm, ABC) - Two people close to Emily start to turn on her, so she does something unexpected. Meanwhile, Emily faces obstacles concerning the Graysons: Her fiancé’s focus drifts, and Grayson Manor is at risk of falling into someone else’s hands.
Drop Dead Diva (9pm, Lifetime) - Season 5 concludes with Jane representing an Amish farmer in a case against a big oil company. Also, Grayson helps a dominatrix try t collect a debt from one of her clients, and Grayson and Jane reveal their feelings for one another but are overheard by an unexpected visitor who threatens to tell everything.
The Walking Dead (9pm, AMC) - Obstacles are encountered by the group members on a mission to find supplies, while conditions at the prison worsen.
The Good Wife (9:30pm, CBS) - Alicia and Cary represent a client who left Lockhart-Gardner, but Will and Diane delay turning over the case files to the new firm. Meanwhile, Marilyn tries to give Alicia some advice, and Will’s colleagues are surprised at the new intensity he displays in the wake of the upheaval at the firm.
Masters of Sex (10pm, Showtime) - Libby and Masters travel to Miami for rest, but he is drawn back into his work by a sexually adventurous couple next door. Back home, Virginia tries to debunk Freud’s theory that one kind of female orgasm is better than another.
Eastbound & Down (10pm, HBO) - Kenny’s thrown off his game when Guy introduces a while card to the show. And April is finally fed up with Kenny’s rediscovered fame.