Sebastian Siegel

Ted and Barney go out to the clubs with Robin, as Lily and Marshall go to an adult wine and cheese party.

Dr. Jack Hodgins ("Bones") asks Walter to help find evidence of extraterrestrial activity; Timo and Willa try to deal with their relationship.

Kate and Jack are at odds; Locke solidifies his position as leader of the Others; Juliet and Sawyer are scrutinized.

Kate takes drastic measures to save Ben's life when Jack refuses to help.

After the captured FBI informant verifies the foretold date of his death, Demetri tries to accelerate his wedding preparations with Zoey. Wedeck attempts to help Aaron invade Jericho to rescue Tracy; Olivia's connection with Lloyd strengthens.