While they were getting ready to bury Boone Locke walked up and said it was his fault. He pretty much explained what happened, just didn't mention the hatch or the fact that he couldn't walk. He said he was hurt.
Jack tried tracking Locke but was walking in circles. Kate made him come back to camp and put crushed sleeping pills in his juice so he would get some sleep.
Locke apologized to Shannon then Shannon asked Sayid to do something about the fact that Locke killed Boone.
Sayid was picked up by the CIA in Sydney. They wanted him to hook up with a former friend who was a terrorist and give them info. on the explosives. In exchange they would tell Sayid where Nadia was.
Sayid hooked up with the friend then felt bad about turning him into the CIA. He tried to get the friend out but couldn't (CIA wouldn't let him because the friend didn't know where the explosives were). He talked the friend into carrying out the suicide bombing.
Charlie was carrying for Claire's baby so she could get some sleep and it wouldn't stop crying until Sawyer started talking. So...Charlie had Sawyer read a car magazine or something like that to the baby so it wouldn't cry. It was really cute

.
Sayid made Locke take him to the plane and sort of interrogated him on the way. He believed Locke was telling the truth (except for the existence of the hatch). Locke confessed that he was the one who hit Sayid over the head because triangulating the signal would probably have put them all in danger.
Sayid told Shannon he believed that it was an accident (Boone's death) and she didn't believe him so she stole the key from Jack's neck while he was sleeping and stole the gun case. Sayid, Jack and Kate caught up to her and she had the gun on Locke. They tried to talk her out of shooting but she fired anyway. Sayid grabbed her just as the gun fired. It grazed Locke's temple.
Sayid confessed to his friend just as they were going on the suicide mission that he was working for the CIA. The friend got upset and killed himself. The CIA agents gave Sayid a plane ticket to Nadia who was in LA. The plane was leaving in 2 hours but Sayid wanted to claim his friend's body so he told them to change his flight to tomorrow and that's how he ended up on Oceanic flight 815.
I think that was all of the important parts.