Chuck (Zachary Levi) and Sarah’s (Yvonne Strahovski) wedding prep includes one final detail: ensuring that the mother-of-the-groom (guest star Linda Hamilton) makes it to the ceremony alive. Meanwhile, Morgan’s (Joshua Gomez) responsibilities as Best Man include his most dangerous mission yet, as he faces Vivian Volkoff (guest star Lauren Cohan). Elsewhere, Ellie (Sarah Lancaster) tends to the last details of the rehearsal dinner and seeks help from an unlikely source. Adam Baldwin, Ryan McPartlin, Scott Krinsky, Vik Sahay, Mark Christopher Lawrence and Bonita Friedericy also star.