Watch what happens when Al Gore pays the set of 30 Rock a visit.

Jacks puts Kenneth in charge of NBC's Green initiative for TGS.

Kenneth turns the new guy into a real actor.

Tina reveals the four improv capitals of the world and more!

Tracy and Jenna set their plan in motion.

Are you ready for Jonathan's steamy haiku readings about Jack Donaghy?

Liz talks about the horrors of auditioning.

Jenna adds her crazy to the audition process.

Is Liz ready for a Brian Williams audition?

Brian Williams prepares for his audition on "TGS."