Just as the walls start to close in on those trapped in Chester's Mill, a possible exit from the dome is revealed.
The team find out if the latest music-making technology can help them top the charts.
While continuing to battle Berlin, Red faces a new threat in the form of Lord Baltimore. A figure from Red's past returns. Liz tries to move on after her showdown with Tom.
A deadly subway collision is investigated as a New York City medical examiner attempts to discover the truth behind his inexplicable immortality.
When a crisis at LAX prevents dozens of airplanes from landing, the government brings in a group of misfit geniuses to sort things out.
Having won denari each through Stylax's betting on a chariot race, he and Marcus have very different ideas on how to spend the money. Marcus, naturally, wants to spend it on Cynthia, whilst Stylax prefers a more laddish approach.
Henry sets out to find the Gehenna Key, which will allow his master Moloch to escape from Purgatory with an army of the damned. Meanwhile, Ichabod tries to free himself from his buried tomb, and Jenny must escape the Hessians holding her on Henry's behalf.
Soos needs a date for his cousin Reggie's engagement party and looks to a dating simulator game to help him talk to girls.
While Christopher races to find Elena, Bobby is double-crossed by the cartel. No longer able to sit by, John Ross puts his own life on the line to attempt a rescue. Meanwhile, Nicolas tries to prove himself to Elena by making a deal with the authorities that puts him on a collision course with John Ross' plan and places both their lives in jeopardy.
When Sheldon must teach a class, Howard decides to take it. Amy takes advantage of the tension between Penny and Bernadette.
Mike travels to Greenville, South Carolina, America and buys an all-black, empty, 1967 13-window Volkswagon Type 2 Deluxe. Also known as a "splitty" due to the two-pane split windscreen, this "bus" is rust-free but missing door cards, half the switch gear, headlining, a radio and has non-standard bucket seats.
Suspicions are running high after the discovery of Cal's body. Cal's friends - Rob, James, Tina, Janine and Annie - are questioned by the police about what happened on the night of the murder. In an attempt to raise spirits, Rob plans a surprise for James's birthday, but he is not in the mood to celebrate and seems intent on uncovering a secret. What relevance does this secret have to Cal's death Meanwhile, Ruth is charged with finding out who supplied the friends with ketamine - a mission that takes her to the heart of the case.
Leonard and Amy make an unexpected trip to Arizona to fetch Sheldon Penny interviews for a job at Bernadette's company Stuart's relationship with Mrs. Wolowitz disturbs Howard.
Detective James Gordon performs his work in the dangerously corrupt city of Gotham, which consistently teeters between good and evil.
Can Richard Ayoade make himself a brighter man with the aid of gadgets He gets Eamonn Holmes and actor Richard E. Grant to help, and challenges memory legend Dominic O'Brien to a contest.
The team investigate the death of a personal trainer who had belonged to a Roman reenactment society and discover a gang selling illegal steroids, but the motive for murder may not be all it seems. And Danny Griffin starts to become attracted to his forensic pathologist colleague Fiona Kennedy just as he receives some troubling news about his wife.
Danielle and Bart get more discouraging news about getting pregnant. The ladies travel to Arden's family's lake house, where Jaime and Danielle bond over their baby frustration. Luci confides in Scarlett and Haley about continuing to flirt with Jeff, but hides the news from Jaime. Luci has bad work news, and it leads to tension with Jaime. Jaime attempts skeet shooting, and everyone lets their hair down at a juke joint that serves moonshine. Jaime starts to accept that the adoption isn't going to happen.
Alex was stabbed in the chest and Charlie sees her as ghost. Alex realizes she saw her father hang himself. Joel has issues with himself about Alex. Maggie end hers and Gavin's relationship. Alex end up in coma and remains ghost.