What to Watch: The TVLine-Up for Sunday

On TV this Sunday: James Cameron explores Titanic‘s mysteries even further, Nurse Jackie, The Big C and The Borgias uncork new episodes, The Client List hopes to rub you the right way, CSI: Miami wraps its 10th (and final?) season and more. On this very busy night, here are 11 programs you may want to keep on your radar.

8 pm Titanic: The Final Word with James Cameron (National Geographic) | The director of Titanic (now out in 3-D!) brings together a team of engineers, naval architects, artists and historians to deliver the ultimate forensic investigation into infamous shipwreck.

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9 pm GCB (ABC) | Back-to-back episodes! In the first hour, Sharon is out for blood when the Matron of Honor duties change hands. The second episode brings a surprising assignment from Pastor Tudor: get frisky. (And you better believe the GCBs take their homework very seriously.)

9 pm The Killing (AMC) | Sarah tracks down Rosie’s backpack; Richmond confronts the truth about his situation; Stan gets in deeper with the mob as Mitch resurfaces.

9 pm Game of Thrones (HBO) | After nine years as a Stark ward, Theon reunites with his father, who wants to restore the ancient Kingdom of the Iron Islands; Davos enlists a pirate to join forces with Stannis and Melisandre for a naval invasion of King’s Landing.

9 pm Nurse Jackie (Showtime) | In the Season 4 premiere, Jackie hits rock bottom and heads to to a “magical place” while All Saints is taken over by a new director (Third Watch‘s Bobby Cannavale) who makes a shocking personnel change.

9:30 pm The Big C (Showtime) | Season 3 premiere: Cathy receives medical news that gives her reason to hope for recovery; Sean supports Andrea’s newfound appreciation for her heritage; Adam turns to prayer to help his ailing mother.

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10 pm CSI: Miami (CBS) | Season 10 finale of the yet-to-be-renewed procedural: When one of the CSIs’ biggest enemies is murdered, Horatio must determine which of his team members is a suspect.

10 pm The Client List (Lifetime) | In this series based on the 2010 TV-movie, Jennifer Love Hewitt reprises her role as a single mother who makes ends meet by working as a massage therapist at an overly accommodating day spa. In other words: On Once Upon a Time, there are no happy endings. Here, however….

10 pm Mad Men (AMC) | Don runs into someone from his past! Joan makes a decision! Roger gives Peggy extra work!

10 pm The Borgias (Showtime) | Season 2 premiere: Pope Alexander VI takes a new lover and throws a grand fete for the citizens of Rome; the rivalry between Cesare and Juan spills into the streets; Della Rovere narrowly escapes an assassination attempt.

10:30 pm Life’s Too Short (HBO) | Season 1 finale: Warwick attends a charity event in the hope of hanging out with celebrities. But while trying to impress rock icon Sting, he ends up spending more than he can afford.

Which of the above is must-see for you? Also, hit Comments to offer your own tune-in suggestions.