This first episode focused solely on Jack, Kate, and Sawyer, who in the last episode were taken captive by the Others in an exchange for Michael’s son, Walt. We probably won’t know what happened to Desmond, John, Eko, and Charlie down in the hatch, or anyone else, though the next episode looks to be really cool, with a rescue attempt.
One thing I’ll add. I’m really glad that no torture was used on any of the characters in this first episode. Too often, TV shows today are resorting to torturing their characters one way or another. I won’t see “24” because of this, and Alias started to turn me away because in episode after episode you had a torture scene. We don’t need to see that in our television, as entertainment. Please keep it that way, Mr. Abrams.