Ken Takemoto

Lily goes into labor while Marshall and Barney are in Atlantic City; Robin and Ted try to distract Lily from her labor pains.

Meredith and Lexie's father returns to Seattle Grace with stomach pains and a new girlfriend; Alex butts heads with the new OB; Mark bribes Jackson for information on Lexie.

With his diagnostic team gone, House tries to diagnose a young woman who survived an office building collapse; Cuddy puts pressure on House to hire a new team.

A killer uses online ads to find perfect candidates for murder: men no one notices are missing. Meanwhile, Jane finds that keeping her pregnancy quiet will be a tough assignment.

Nate anxiously awaits Lisa's return; Vanessa and her sister enjoy a therapeutic shopping session; Claire grades herself in art school.