Tonight, Grey's Anatomy returns with an all-new episode entitled "Let the Angels Commit." We'll have to see what the title holds symbolically, but here's the brief rundown of we've figured out is going on tonight:

To the envy of her fellow interns, Cristina gets to scrub in something known as a "humpty dumpty" procedure. Meanwhile, a series of events causes Alex to question his future medical specialty.

George assists Addison, who must work with a pregnant woman with an unusual dilemma -- she's pregnant with twins, but one of them is growing slower than the other.

Also, another patient's wife makes things hard on the staff since she has made her husband's health her job. Lastly, Derek receives a surprise visit from his sister (played by Embeth Davidtz).

All of this should be very interesting. As usual, we will have our exclusive episode guide up shortly after the broadcast, followed by our lists of quotes, pictures and music/lyrics from the episode.

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