In island time: Hurley's talking to dead Jacob again. Jacob instructs him to bring a suspicious Jack to an ancient lighthouse high up on one of the island's rocky shores and to direct the mirrored lights at the top of the lighthouse to a particular set of coordinates. Somebody is coming to the island, Jacob says, and they need help finding the way.
Jack tags along because he wants to see Jacob: No longer the skeptical man of science, Jack is now convinced there's some weird mumbo jumbo afoot that's taken him to the island--twice. When Hurley tells Jack that he must come with him because Jacob said Jack "has what it takes," that seals the deal. Jack's dad once told him that Jack didn't have what it took. Jack is convinced Jacob, whoever the heck he may be, knows more than is normal about his life and he wants to confront him.
When they get up in the lighthouse, Jack demands to see Jacob. But Hurley can't deliver him. Only Hurley, it seems, can see Jacob. Around the mirrors on the light, Jack sees hundreds of scrawled names next to numbers, including his own, next to the number 23. When he aligns the mirrors to his name and number, he see his own childhood home in the mirrors. He becomes angry, convinced that Jacob has been watching and manipulating him for many years and he wants to know what Jacob is after. He becomes so angry, in fact, that he smashes all the mirrors.
Later, Jacob turns up to visit Hurley, as Jack seethes and ponders, staring out at the sea. Jacob is surprisingly calm about the smashed mirrors, telling Hurley that Jack has a purpose on the island, but is having trouble determining what it is. He'll come around.
Jacob also tells Hurley that he and Jack must stay away from the Temple, because danger is coming there. Hurley wants to go back and warn those at the Temple, but Jacob calmly tells him that it's too late.
Elsewhere on the island, Jin and the Other Justin are taken by the new, mentally-disturbed jungle version of Clair to her camp. She's convinced that the Others took her child three years ago when the other Oceanic survivors left the island. Jin trieds to calm her down, but to no success. When Justin insists that they don't have Aaron, she kills him. She also tells Jin that she hasn't been on her own over the past three years. She was with her dad, Christian Shephard, for a while and an unnamed "friend."
Right around this time John Locke/Smokey turns up at Clair's tent. Startled, Jin says "John!" Claire, amused, says, "That's not John. That's my friend."
In sideways time: It turns out Jack is divorced (we don't know from who) and has a surly teen-aged son. As with earlier in the season, this version of Jack seems mystified by certain things, though. Earlier, it was a wound on his neck. This time its a scar from having his appendix out. He talks to his mother, asking when he had his appendix removed. When he was a child, she says. But we know that he had this surgery performed, under primitive conditions, as an adult on the island. Through the course of the episode Jack and his son make amends. Jack realizes that, like his own dad, he's been hard on his son and difficult to deal with. He shows his gentler side and apologizes, hoping to be a better dad.
Questions/observations/speculation:
- Who is the mother of Jack's son?
- Does/did he have a child in the regular timeline too?
- Who is coming to the island? Is Jacob telling the truth about this?
- What's the secret behind Jacob's lighthouse and Jacob in general?
- Did Smokey inhabit the body of Christian Shephard before that of Locke? Or did Jacob? It seemed like, in the past, Jacob was the one speaking through Christian?
- The song that David, Jack's son, performs on piano is Chopin's Fantaisie Impromptu, the same piece we hear a young Daniel Faraday playing last season.
- On their way to the lighthouse, Hurley and Jack pass the caves the survivors lived in shortly after the crash. And they again see the bodies of two previous plane crash survivors. Who were they people? Hurley wonders if its the Oceanic survivors themselves, displaced in time.
- Jack also see his father's coffin and tells Hurley that the body was missing after the crash, and that he follows his father's ghost, or something, to the caves, which is how he found them in the first place.