What to Watch on Sunday: Some favorites return on Showtime

Titanic: The Final Word with James Cameron (8pm, NGC) - National Geographic Explorer-in-Residence James Cameron, who also directed the blockbuster "Titanic" film, assembles the world's leading experts on the sunken ship to investigate lingering mysteries of how and why the "unsinkable" ship sank.

Nurse Jackie (9pm, Showtime) - Season 4 opens as the hospital has been taken over by a multinational corporation and placed in the care of a no-nonsense doctor (Bobby Cannavale) who is eager to make changes to the hospital and staff. Meanwhile, Kevin and Jackie have split and Jackie's troubling encounter with a fellow drug user (Green Day's Billie Joe Armstrong) helps propel her into rehab. I got to watch nearly the whole season and it's worth sticking with.

Great Expectations (9pm, UNC-TV) - The conclusion of newest version of the Charles Dickens classic. Tonight, Pip is in London, where his guardian explains his allowance. In time he learns the ways of gentlemen, and he falls further in love with Estella.

The Killing (9pm, AMC) - Sarah searches for Rosie's backpack, while Richmond comes to grips with his diagnosis of paralysis, and Mitch finally turns up.

Celebrity Apprentice (9pm, NBC) - First up: fallout from last week when Arsenio Hall went on a tirade against Aubrey O'Day. Then for the challenge, the players must write, direct and produce a 60-second commercial for an entertainment website. I'm going out on a limb here, but expect Lou Ferrigno to give 110% and for Lisa Lampanelli to cry because she does all the work for the worthless numbskulls on her team.

The Big C (9:30pm, Showtime) - Turns out last season's finale was a cliffhanger. Huh. Well, that gets resolved in tonight's third-season premiere, and also, Cathy receives encouraging news about her cancer. Really good to have this one back.

The Borgias (10pm, Showtime) - In the Season 2 premiere, a cache of long-lost Italian artifacts is discovered, inspiring Pope Alexander VI (Jeremy Irons, left) to throw a pagan-theme feast for the people of Rome. Meanwhile, Alexander's mistress discovers he has taken another lover.

Mad Men (10pm, AMC) - Don has an encounter with someone from the past and Joan comes to a momentous decision. Meanwhile, Roger increases Peggy's workload.

The Client List (10pm, Lifetime) - Adrienne was going to review this new Jennifer Love Hewitt series, but decided not to. These are her hilarious comments on the show: "It's kinda not worth it. It makes me SOOOO mad that they canceled Against the Wall and put this crap on. It's basically a showcase for JLH to prove she's got a hot body. It's really idiotic. I just want to go all Kanye and say "Lifetime hates women." Because why else would they put on a show that objectifies women while trying to pretend it's doing something 'feminist' by objectifying men. And then they try to make it light and serious. Look, I just can't talk about it anymore!"
Skip it.

The Pitch (11pm, AMC) - The first episode in a new reality series following real-life ad agencies who compete against each other for the chance to land new business. In tonight's episode, McKinney, a Durham firm, and a New York firm both pitch ideas to Subway executives. Read our story about McKinney and their experience on the show.