This week's Grey's Anatomy, entitled "Almost Grown," marks another trip behind the camera for cast member Chandra Wilson, who made her directorial debut last year.

In this sneak preview from the episode, Lexie melts down in a critical situation and Meredith is left in charge by Derek. Safe to say tensions are running high in Seattle:

[video url="http://www.tvfanatic.com/videos/almost-grown-sneak-preview-1/" title="Almost Grown Sneak Preview #1"] [/video]

Follow the jump for a second clip - in which Callie gets competitive over the potential windfall for her department - and two quick promos from the October 21 episode ...

[video url="http://www.tvfanatic.com/videos/almost-grown-sneak-preview-2/" title="Almost Grown Sneak Preview #2"] [/video]

[video url="http://www.tvfanatic.com/videos/almost-grown-promo/" title="Almost Grown Promo"] [/video]

[video url="http://www.tvfanatic.com/videos/almost-grown-promo-canadian/" title="Almost Grown Promo: Canadian"] [/video]

Steve Marsi is the Managing Editor of TV Fanatic. Follow him on Google+ or email him here.