In spectacular season-finale fashion, Liz Lemon attends three weddings in one day, decides to pursue new love instead of settling, and helps Jack navigate his own love triangle at the end of Season 4. This episode also features a veritable parade of guest stars in Michael Sheen, Will Forte, Elizabeth Banks, Julianne Moore, Jason Sudeikis, and Matt Damon.
In all the chaos, "I Do Do" asks some important questions about love and life, as Liz, Jack, and Jenna face important decisions. Can you love two people at the same time? If you make a choice, will you always be wondering what was behind that other door, "like at a haunted house sex party"? Should you take control of your fate as Jack insists, or, as Liz says, "let it wash over you, like a spray tan that won't take because your skin is too oily?"