Tina Fey vs. Aaron Sorkin
Back in 2006, two NBC TV shows about NBC TV shows entered the death ring of the fall season. Only one emerged victorious, and it was Tina Fey's brilliant and beloved 30 Rock. But for a while there, it wasn't clear whether the gang at TGS would beat out the gang at Aaron Sorkin's Studio 60 on the Sunset Strip. This created a friendly archrivalry between the pair that has been lampooned many times on 30 Rock, even with a guest appearance by Sorkin himself. To this day, Studio 60 is the only show created by Sorkin that wasn't renewed for a second season, while 30 Rock was Fey's very first show and it ran for 7. This rivalry is almost as good as the one between Liz Lemon and that mouse that keeps pooping in her slippers.