Series 2, Episode 16
On the island it has been decided Ana-Lucia, Charlie and Sayid will attempt to verify the hatch-prisoner Henry's story about how he became stranded on the island when they trek to find his hot air balloon. Meanwhile back at the beach Sun recalls her relationship problems with Jin through the flashbacks and him wanting a baby with her. She goes to Sawyer for a pregnancy test kit (which he just so happens to have lying around of course) and it isn't long before everybody knows she's expecting.
Listen out for a wonderful wise-crack from Charlie when he refers to Sayid's lack of humour to Ana-Lucia.