S4, E13: To avoid feeling lonely on Valentine's Day, Liz Lemon (Tina Fey) schedules a root canal but soon realizes she hasn’t thought it through. Meanwhile, Jack Donaghy (Alec Baldwin) woos an attractive and successful CNBC host, Avery Jessup (guest star Elizabeth Banks), and Jenna Maroney (Jane Krakowski) is disappointed when her creepy stalker loses interest. Also starring: Tracy Morgan (Tracy), Jack McBrayer (Kenneth), Scott Adsit (Pete), Judah Friedlander (Frank), Keith Powell (Toofer), John Lutz (Lutz), Katrina Bowden (Cerie), Kevin Brown (Dotcom), Grizz Chapman (Grizz).