A pop star checks in to the hospital, but it upsets the status quo. Meanwhile, love is all around as Kara and Hunter's relationship intensifies; Dr. McAndrew hopes to rekindle his romance with Dr. Grace; Emma and Leo start to reconnect.moreless
A new doctor arrives at Ocean Park after being recommended by Nurse Jackson, but she starts having second thoughts about her decision after observing his methods. Meanwhile, Emma, Dash and Jordi go in search of the ideal gift for the newly awakened Charlie and Kara learns the truth about Hunter.moreless
Nurse Jackson, whose actions have caught up with her, finds support from Kara, Hunter, Jordi and Dash. Meanwhile, Emma meets Leo's friends from home, and one of the kids' circumstances changes dramatically. Nurse Jackson (while on suspension), decides to do what she did before nursing, SINGING!moreless
Leo abandons Emma and Jordi tries to fill the vacancy. Meanwhile, a new patient shocks Kara; Nurse Jackson is desperate to keep Charlie at Ocean Park to the point of crossing a line, a position shared by Dr. McAndrew's ex, Dr. Erin Grace, who is returning after a one year sabbatical. Leo and Jordi fight over Emma.moreless
When details of Charlie's accident are revealed, Nurse Jackson is left with a difficult decision to make if she is to honor a promise she made to Charlie. Meanwhile, Jordi gets an interesting taste of freedom.moreless
Friendships start to form when Jordi starts his treatment; Kara goes back to school for homecoming; Emma attends her first dance; and Leo finds himself in an awkward position.
Jordi and Emma bond, in spite of Leo telling Jordi to stay away from her. Also, Jordi's mother, whom he had said was dead, returns to look after her son.
Leo reacts badly to an unexpected outcome from Jordi's surgery. Meanwhile, Kara's parents work their connections in the hopes of finding a heart for Kara.
As the Dome collapses, Joe, Norrie, and Hunter find a way out. Meanwhile, Big Jim loses someone close to him and tries to make a deal with the Dome.
With the egg gone, the Dome starts contracting, threatening everyone within. Barbie contacts his father and demands the egg, revealing the presence of his half-sister. Meanwhile, Melanie's condition grows worse and Big Jim works with Pauline to create a new painting that will show them the way.moreless
The temperatures inside the Dome plummet and Julia and Barbie go to save the food, while Big Jim looks for fuel to power the generator at the high school. Meanwhile, Melanie begins to suffer and Junior realizes that her health is tied to the egg.moreless
Big Jim is reunited with the wife that he believes is dead, while Barbie and Julia are reunited and realize that the egg is missing. Meanwhile, Joe and Norrie meet Hunter and set out to find the egg, as the temperature beneath the Dome begins to drop.moreless
The mercenaries capture Barbie and demand that he get the egg for them. Meanwhile, Sam, Pauline, and Lyle try to track down the red door from Pauline's visions, and Big Jim makes a deal with the mercenaries guarding the Dome.moreless
While Ethan begins to question himself about purpose, John is alarmed about his rapid intellectual growth and Molly is still looking for her baby.
Barbie makes contact with a mysterious hacker who knows that Barbie's father Don is playing a dangerous game. Meanwhile, new sheriff Big Jim suspects that someone is after him and enlists Junior and Rebecca to help him.moreless
When Barbie tries to recover Sam's body, he is pulled into the chasm and finds himself outside the Dome. He sets out to find the one man who can help him get back into the Dome with Julia: his father, Don. Meanwhile, Julia tries to conceal that Barbie is apparently dead but Big Jim finds out and uses the information for his own purposes.moreless
Barbie and Sam investigate the tunnel behind Melanie's locker at the school, but an explosion cuts them off from the others. A dust storm comes up and Julia must choose whether to help the town or try and rescue Barbie. Meanwhile, Joe and the other three hands recover the egg from the lake.moreless
Julia takes over as the new leader of Chester's Mill, after the town becomes divided over Big Jim and Rebecca's population-control plan. Meanwhile, Joe and Norrie help Melanie search for clues about her identity at the dome wall.moreless
Barbie and Julia take opposing sides when Big Jim and Rebecca take extreme steps to extend the town's resources. Meanwhile, the mystery of Melanie Cross deepens.