Season one introduces us to Liz Lemon, the head writer of The Girlie Show, a live sketch comedy series which airs on NBC. When the network executive dies, Jack Donaghy replaces him and drastically changes the show, including adding crazed movie star Tracy Jordan to the show's cast and changing the title of the show to TGS with Tracy Jordan. A rivalry develops between cast members Tracy and Jenna Maroney, we get a glimpse into Liz's relationships with Dennis Duffy and Floyd Debarber and Jack's relationship with Phoebe.
- Rachel Dratch - Greta Johansen and other characters
- Sue Galloway - Sue LaRoche-Van der Hout
- Emily Mortimer - Phoebe