Ep 12. There's No Place Like Home (1)

In Lost season 4, episode 12, titled "There's No Place Like Home (1)," the Oceanic Six are finally back in civilization after being rescued from the island. However, their joy is short-lived when they learn that one of their own, Aaron, did not make it off the island with them. Jack, Kate, Hurley, Sayid, Sun, and Aaron's grandmother, Carole Littleton, are devastated by this news and set out on a mission to find him.

Meanwhile, the episode flashes back to the island and shows what happened after the Oceanic Six left. John Locke (aka the Man in Black) and Benjamin Linus work together to move the island, which causes a series of strange events to occur. The survivors left on the island have to deal with time flashes, which send them to different moments in their lives without warning. Sawyer, Juliet, Daniel, Charlotte, and Miles are forced to navigate through these time jumps while trying to find a way to stop the island from moving.

Back in the real world, the Oceanic Six are faced with struggles of their own. They have to deal with the fallout of lying about their experiences on the island and stick to their story in order to protect the people they left behind. Jack struggles with addiction and tries to keep his cool in front of the press, while Kate worries about being caught by the authorities for her past crimes. Sun has to deal with the loss of her husband and the pressure of managing her family's business alone.

As the episode comes to a close, it becomes clear that all of the characters are interconnected in ways they never imagined. The fate of Aaron and the island are intertwined, and the Oceanic Six begin to realize that they may have to return to the island to make things right. The episode leaves viewers on a cliffhanger, eager to see what the future holds for these characters.