Harvey turns to a former colleague for help in proving the firm’s case.

After they escape a riot, Travis, Liza and Chris seek refuge with the Salazars; Madison defends her home.

Meredith and Cristina lie to each other and themselves about their relationships with McDreamy and Burke, respectively. George is given a hard task to expel a discharged and defiant woman…

Cristina, Izzie and Meredith take care of Shane, a man who appears to be crazy and claims that he is pregnant. Shane’s case induces a spreading fascination among the staff….

While Madison struggles to keep Nick from crippling withdrawal, Travis ventures out to find his son before the city of Los Angeles falls.

Cristina and Meredith try to figure out if Cristina should tell Burke that she’s pregnant right before Cristina faces an emergency. Alex and Izzie get closer while Meredith’s mother gets…

A highly dysfunctional blended family is forced together when they realize a reported virus is actually the onset of the undead apocalypse.