Now playing in this week's Mitovich Mega Minute:

• Who is returning to Grey's Anatomy? And why does it almost assuredly promise one doctor more angst?

• Dipping into the Mega Mailbag: Is The Unit in the midst of a shake-up? Get the answer.

• Get tune-in dates for big CSI, Criminal Minds and Lost episodes.

Crave TV scoop? E-mail senior editors Matt, Mickey and Tim at mega_scoop@tvguide.com.