This season is dominated by four main storylines, two of which are inspired by real life. The show's main leads, Liz and Jack both have some lifestyle changes to deal with as they enter new stages of their lives, with Liz turning 40 and entering true adulthood, complete with a legitimate relationship (with her pilot boyfriend Carol (Matt Damon)), while Jack marries his girlfriend Avery (Elizabeth Banks) and becomes a father. It's a big change for a series that's kept things relatively unchanged for its characters over four years. But thankfully, at their cores, they are still the people we've come to love over the past four years, just facing new challenges.