-- "Titanic's Final Mystery" (April 5 at 8 p.m. EDT on the Smithsonian Channel) re-examines two critical questions of the Titanic's demise: Why did it hit the iceberg in the first place? And why did the ship closest to Titanic, the Californian, never come to its rescue? Author and Titanic expert Tim Maltin uncovers evidence that both ships were deceived by mirages, dooming Titanic to its fate.
-- "Titanic: the Final Word with James Cameron" (April 8 at 8 p.m. EDT on National Geographic Channel) follows the Oscar-winning filmmaker and National Geographic explorer-in-residence as he dives back into Titanic's mysteries. Cameron gathers some of the world's leading Titanic experts to pore over underwater footage from Cameron's more than 30 dives to the wreck, as well as historical records, survivor eyewitness accounts and scenes from Cameron's blockbuster hit, as well as a never-before-seen stress model and forensic evidence. The goal: to answer questions about how the ship broke apart and why its remains are scattered.
-- "Save the Titanic with Bob Ballard" (April 9 at 10 p.m. EDT on National Geographic Channel) sets the man who discovered the ship's final resting place on a new quest: protecting Titanic's underwater graveyard. As evidence mounts that the ship is under siege by natural forces, careless visitors and, possibly, rogue salvage attempts, Ballard mounts an effort to protect the legacy of history's most famous ship. Ballard's odyssey takes him to the shipyards of Northern Ireland to meet with descendants of the men who helped build Titanic, then sailed on her maiden voyage.
-- "The Titanic with Len Goodman" (April 10 at 8 p.m. EDT on most PBS stations) examines the impact of the sinking on the thousands of affected families, part of the Titanic legacy that lives on in the victims' descendants. Len Goodman, best known as a judge on "Dancing With the Stars," has his own connection: Before he was a dancer, he was a welder in East London for the company that built Titanic, in Belfast, Northern Ireland. Goodman takes viewers on an exploration of the ship's 100-year legacy through the stories of the handpicked group of men who helped build Titanic and then died with it.