Private Practice Preview: "Wait and See"

Below is a clip from the Grey's Anatomy-Private Practice crossover event, which continues Thursday evening in the setting of Seattle Grace hospital.

Ever the cool customer, Derek finds his confidence shaken while in the O.R. with ex-wife Addison, debating what treatment is best for their patient ...

Follow the jump for another preview - by this point, Addison is back in California, delivering a baby and uttering some words no parent wants to hear ...