Walt (New York, New York). Walt hasn't seen his dad in three years, and he asked Locke if Michael was on the island. In order to spare Walt further pain, Locke lied and said the last he heard, Michael was on a freighter just offshore from the island, and then decided not to try to recruit Walt. He took his leave of his former protege, but not before hearing that Walt had been dreaming about Locke, in a suit, back on the island, surrounded by people who want to hurt him. (more on this in a bit). Also, Ben watched this whole exchange.
Ben stages the suicide, then wipes down his prints. He spots Jin's ring, then pockets it, knowing he can use it to get Sun back to the island. Ben says, as he leaves, "I'll miss you, John. I really will." And you kinda have to believe him, because why else say it to the dead guy?
The Bookend - Hydra Island
Aside Number 8 - It's difficult to figure out at this point if Ceasar and Ilana knew each other before the flight. It's hard to imagine why a marshall and a random single passenger would. On the other hand, they were the only two people, other than Ben and the Oceanic 6, who managed to get seats in business class. However, given what Ceasar tells Locke at the end of the episode, they may only seem to know each other now in light of a freakish shared experience.