Plot summary
Locke agrees to Jack's offer of surgery. Desmond recovers Christian's coffin and beats Ben up, making him remember the island, then turns himself in to the police. As he, Kate, and Sayid are transported to county prison, Hurley arrives and pays off the driver, Ana Lucia, to free them, whereupon they all leave for Daniel's concert. On the island, Jacob takes his ashes and burns them to end his time in the mortal world, explaining to the remaining candidates that he chose them because they were hurt, lonely people like himself and he needed one of them to take his place.
Jack agrees and is made the protector. While Ben gets C4 to destroy Flight 316, he is confronted by Zoe and Widmore when the Man in Black arrives. He kills Zoe and threatens to kill Penny if Widmore does not tell him how to get off the island. Widmore starts to explain that he brought Desmond back because of his resistance to electromagnetism, only for Ben to kill him. They find that Desmond has escaped the well.
Credits
Adapted from Wikipedia contributors, Lost season 6. HTML formatting and reference markers removed.