They also appear to be doing some sort of 'what if' flashes, that is, "What if setting off the nuclear device had worked and they'd landed in LA instead of on the island." So far in these parts- Kate escaped from the police bloke and got in a taxi with Claire, Charlie nearly died but Jack saved him (Charlie seemed v annoyed at this), Jack's dad's body disappeared, Desmond was on the flight (possibly they would have changed the whole fabric of time if it had worked?), Shannon (remember her??) wasn't on the flight for some reason, Locke's still in a wheelchair but Jack gave him his card in case he ever wanted a free consultation and I realised that Rose wouldn't be cured if they didn't land on the island, Jin and Sun are having troubles at customs, errm, can't remember anything else, oh yeah! Sawyer found out Hurley is a millionaire and told him not to tell people because they'll take advantage! Also back in non flashy world (i.e. on the island) Saywer got Miles to listen to dead Juliette who wanted to tell Sawyer something before she kicked the bucket and it turned out what she'd said was "It worked" (suppose she means the device?)