'D.O.C.' by Edward Kitsis and Adam Horowitz

After discovering that all of "The Others'" pregnant women died before giving birth on the island, an extremely reticent Sun allows Juliet to examine her -- and uncovers the identity of the unborn child's father. Meanwhile, Desmond allows an unlikely nemesis to help save the life of a new, mysterious island inhabitant...

Matthew Fox (Doctor Jack Shephard), Evangeline Lilly (Kate Austen), Dominic Monaghan (Charlie Pace), Jorge Garcia (Hugo ‘Hurley’ Reyes), Josh Holloway (James ‘Sawyer’ Ford), Daniel Dae Kim (Jin Kwon), Yunjin Kim (Sun Kwon), Naveen Andrews (Sayid Jarrah), Terry O'Quinn (John Locke), Emilie de Ravin (Claire Littleton), Henry Ian Cusick (Desmond Hume), Michael Emerson (Ben Linus), Elizabeth Mitchell (Juliet Burke), Byron Chung (Mr. Paik), Andrew Divoff (Mikhail), Marsha Thomason (Naomi), John Shin (Mr. Kwon), Alexis Rhee (Older Woman), Esmond Chung (Paik's Associate), Jean Chung (Paik's Ssecretary)

Directed by Fred Toye
Produced by Sarah Caplan
Executive Producers J.J. Abrams and Bryan Burk

TX (US): 25th April 2007

Notes:
*Featuring Jack, Kate, Locke, Charlie, Sayid, Sawyer, Hurley, Jin, Sun and Claire