TGS is going to get cancelled if Liz and the gang can't get Tracy to join the show for its 100th episode.  Tracy tries to get his image back to that of a fool, but every time he tries he just ends up looking better in the eyes of the public.

Meanwhile, Tom the custodian caused a gas leak that got into both the TGS floor and Jack's office, so everyone starts going a bit crazy.  Amidst the craziness, Jenna decides she wants a baby and Liz calls Dennis to reunite.