30 Rock: 2x05 - Greenzo

• Jack introduces Greenzo (aka special guest star David Schwimmer) to help the company promote non-judgemental business-friendly environmentalism
• Greenzo gets fired when he takes the job too seriously and criticises big business
  
• Jack tries to get very special guest star, Al Gore, to take over
• Al Gore decides to save a whale instead
  
• Kenneth throws a party; Tracy turns it into one crazy party
• Pete's having an 'affair' with his wife in Liz's apartment