Tonight's Grey's Anatomy, "Give Peace a Chance," is all about Derek. Which we imagine will prove quite popular. But our man is certainly under the gun from the beginning.

When he learns that a Seattle Grace employee has a near-fatal tumor, Derek wants to operate anyway, to do whatever he can. Richard, of course, is standing in the way.

In essence, McDreamy is fighting two battles tonight, the first to save lab tech Isaac's life, despite the very long odds, and the other against the Chief's dwindling authority.

For a primer on this evening's intense episode, follow these links to see the previews and pictures we've posted, plus the Grey's Anatomy spoilers we've been compiling.

Then discuss with fellow Grey's fans in our

Will McDreamy save the day? Who's with him and who's against him? Is the Chief just a figurehead at this point? How will this developing power struggle play out?

What do you think and hope will happen on tonight's Grey's Anatomy?

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