The Greater Good (Lost)

Arrested at Heathrow Airport on trumped-up terrorism charges, Sayid is recruited as an informant by the Australian Secret Intelligence Service and the CIA, who ask him to infiltrate a terrorist cell in Sydney of which his old friend Essam is a member.

It is revealed that after helping her escape several years ago, Sayid left Iraq and has been travelling the world trying to find her ever since.

The agents tell him to convince Essam to go ahead with the suicide bombing so that he will lead them to the explosives, and threaten Nadia's life when Sayid attempts to refuse.

After Essam's death, the agents tell Sayid where Nadia is living in California, and hand him a plane ticket and money.

At the same time, Kate Austen (Evangeline Lilly) tracks down an exhausted and obstinate Jack Shephard (Matthew Fox).

Meanwhile, Charlie Pace (Dominic Monaghan) tells Claire Littleton (Emilie de Ravin) that she needs to rest, and though reluctant at first she lets him take care of her baby.

Realizing he'd probably try this, Kate drugs his juice and he falls asleep, leaving Sayid free to deal with Locke.

Left with no choice, Sayid tackles Shannon just as she fires the gun, the bullet grazing Locke's head.

Well, Maggie Grace is given an opportunity to shine and she does an acceptable job as the distraught sibling who is now looking for someone to blame for Boone's death.