Season 4 4x01 - Crichton Kicks 4x02 - What Was Lost, Part 1 (Sacrifice) 4x03 - What Was Lost, Part 2 (Resurrection) 4x04 - Lava's a Many Speldored Thing 4x05 - Promises 4x06 - Natural Election 4x07 - John Quixote 4x08 - I Shrink, Therefore I Am 4x09 - A Prefect Murder 4x10 - Coup by Clam 4x11 - Unrealized Reality 4x12 - Kansas 4x13 - Terra Firma 4x14 - Twice Shy 4x15 - Mental as Anything 4x16 - Bringing Home the Beacon 4x17 - A Constelation of Doubt 4x18 - Prayer 4x19 - We're So Screwed, Part 1 (Fetal Attraction) 4x20 - We're So Screwed, Part 2 (Hot to Katratzi) 4x21 - We're So Screwed, Part 3 (La Bomba) 4x22 - Bad Timing