Tina Fey has said that the time is right for 30 Rock to end.
Speaking to the Los Angeles Times Fey said: "Things do end, and you want them to end when we're running through the finish line and not limping to it, and not vomiting or pooping ourselves."
However, the actress who plays Liz Lemon on the show admitted that she will find it difficult to leave the show saying: "You have to muster the maturity to leave it. But we're all going to be a mess."
When asked what was in store for the hour long season finale NBC chief Greenblatt said: "I know Tina, Alec Baldwin and the rest [of the cast] will deliver some of their best work. We think the world of Tina."