Last Thursday on 30 Rock, Jack's mom made a memorable appearance (how could it be otherwise), while Liz and Tracy tried living in the other's shoes for a time.

"The Natural Order" was quite awkward. But worth watching.

If you missed the episode, watch it below!

[video url="/videos/30-rock-full-episode-the-natural-order/" title="30 Rock Full Episode: The Natural Order"] [/video]

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