Claire shows Jack a music box she received in Christian's will

Jack sees Claire at the hospital while he's visiting Locke. She has come to talk to him and they go to a waiting area where Jack gets an Apollo candy bar from a vending machine.

Claire tells Jack that she never met Christian, which is different from the original timeline, and she opens a box containing a music box. She says that the lawyer, Ilana, said there would be more that was left to her in Christian's will, but he specifically wanted her to have her the music box.

Claire asks how Christian died, and Jack reveals that he was found in an alley outside a bar in Sydney and that he drank himself to death. Jack tells her that he flew to Sydney to get the body and they airline lost it, prompting Claire to tell him that she just flew in from Sydney. Jack asks when and when she says Wednesday, he asks "Oceanic 815?," which she obviously confirms. Jack is stunned once again.

Jack asks to look at the music box, and when he opens it, it plays "Catch a Falling Star," the same song from Claire's childhood and the one she wanted to be sung to Aaron, which Kate did off the island. There's a moment where they are both looking into a mirror built into the lid of the box, continuing the mirror trend from the flash sideways stories.

Jack then asks Claire to come stay with him since they are family. They both smile and seem quite happy about their worlds coming together.

Ben takes Alex from Danielle Rousseau, young Ethan waits nearby

In 1989, Ben (who is about 24 or 25) is with a young Ethan Rom (who is about 12) looking at Danielle Rousseau's camp on the beach. Ben is just looking at the camp when Ethan asks him twice if he wants him to do it. Ben tells Ethan to shut up and stay there. With his gun drawn, Ben moves into Rousseau's camp, stops at the entrance and the moves in. Once inside, he hears a baby (Alex) cry which startles him causing him to knock Rousseau's music box to the ground. Rousseau wakes up and reaches for her gun but Ben tells her to stop. Rousseau says "You're the one who infected us, aren't you?" Ben moves towards Alex and Rousseau begins screaming "Rendez-moi mon bébé!" Ben picks up Alex and Rousseau asks him not to take her. Ben asks her "Do you want your baby to live?" Rousseau screams "Why are you taking her?" and steps towards Ben who then fires his gun into the sand. He tells her to "Be grateful you're still alive." He continues saying that if she follows him or ever comes looking for him, he'll kill her. He then tells her "Everytime you hear whispers, you run the other way." Ben the darts out of the tent/hut.

So this explains why Danielle Rousseau was so paranoid about the whispers in the first few seasons. It also gives us a glimpse of young Ethan who seems to have already joined the others. What's weird about this is that the purge didn't occur until 1992, so Ben and Ethan were working with the others while Ben was still living with the Dharma Initiative. Did Ben sneak out at night to help the others and then go back to the barracks?

Jin finds Rousseau's camp, she shoots Robert

After the time skip, Jin sees smoke coming from the beach and goes to investigate. He finds Danielle Rousseau's camp. He finds her music box with the dancers that Sayid fixed for her in season 1. Jin also examines her shelter which has a box of explosives next to it, meaning she must have already been to the Black Rock. After noticing flies buzzing around, Jin finds the bodies of Brennan and Lacombe who have been shot. He hears Danielle and Robert arguing and goes to see what's happening. He finds Danielle holding a gun on Robert and she says that the monster changed him. Robert says it's not a monster, "it's a security system guarding that temple." He convinces her to lower her weapon but as soon as she does he tries to shoot her but the gun doesn't fire. She then shoots Robert in the head and sees Jin and starts firing at him. As he runs away through the jungle, time skips again.

So what happened to Robert down under the temple with the monster to make him turn on Danielle? Is Robert right about the monster being a security system for the temple? It would definitely seem that Danielle isn't as crazy as she initially seemed in the first few seasons.