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Chuck and Morgan try to find Chuck's mother, while Sarah and Casey investigate a Russian operative.
Chuck and Sarah go undercover in Milan in order to find a secret weapon.
When Chuck and Sarah get conned out of their wedding money, there is only one man they can turn to for help -- Sarah's conman father, Jack Burton. Meanwhile, Morgan pressures Casey to face Alex's mother, Kathleen.
Chuck and Sarah put aside spy work to have a weekend of debauchery, but Devon's plans for Chuck's big night don't go quite as expected. Meanwhile, Ellie's investigation into her father's computer leads to a life-changing discovery.
Chuck and Sarah's wedding planning includes one final detail: ensuring that the mother-of-the-groom makes it to the ceremony on time and alive. Meanwhile, Morgan's responsibilities as Best Man include his most dangerous mission yet, as he faces Vivian Volkoff. Elsewhere, Ellie tends to the last details of the rehearsal dinner and seeks help from an unlikely source.moreless