When a heartbroken Roseanne locks herself in her room and won't come out, her family and friends all try in their own unique way to help her get out of her funk. Friends and family try an intervention after they're unable to rouse a listless Roseanne out of bed, where she's been for four days amid piles of junk food, depressed over Dan's affair.

Few realize that the Titanic had two nearly identical sister ships, the Olympic and the Britannic. The Olympic had a successful career as a liner until she was broken up in 1935, but the Britannic met with a fate nearly as unlucky as that of the Titanic. Serving as a hospital ship in the Aegean, it was either torpedoed or the victim of a mine on November 21, 1916, and sank within an hour. Thirty out of its crew died. Robert Ballard will search for the wreck of the Britannic and explore the evidence surrounding its dramatic end.

Mike butts heads with a hard-nosed new chief of staff appointee, Gabby Sanchez, who is unmoved by his best efforts to win her over. Meanwhile, Paul ponders taking his relationship with Claudia to the next level.