'Live Together, Die Alone' by Carlton Cuse and Damon Lindelof

After discovering something odd just offshore, Jack and Sayid come up with a plan to confront "The Others" and hopefully get Walt back. Meanwhile, Eko and Locke come to blows as Locke makes a potentially cataclysmic decision regarding the "button" and the hatch...

Matthew Fox (Doctor Jack Shephard), Evangeline Lilly (Kate Austen), Dominic Monaghan (Charlie Pace), Harold Perrineau (Michael Dawson), 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), Adewale Akinnuoye-Agbaje (Mr. Eko), Michelle Rodriguez (Ana Lucia), Cynthia Watros (Libby), Malcolm David Kelley (Walt), Henry Ian Cusick (Desmond Burke), Sam Anderson (Bernard), M.C. Gainey (Mr. Friendly), Michael Emerson (Henry Gale), Clancy Brown (Kelvin Inman), Tania Raymonde (Alex), April Grace (Ms. Klugh), Alan Dale (Charles Widmore), Stephen Page (Master Sergeant), Michael Bowen (Pickett), Sonya Walger (Penelope), Len Cordova (Man No. 1), Alex Petrovitch (Man No. 2), Eyal Podell (Young Man), Cathy Foy (Receptionist)

Directed by Jack Bender
Produced by Sarah Caplan
Executive Producers J.J. Abrams and Bryan Burk

TX (US): 24th May 2006

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

*This is a double-length episode