As Chuck and Sarah try to realize a new, safer future, Morgan's past as the Intersect sends them to Vail on one last mission, where they enlist the help of an unlikely source - the legendary BO DEREK (guest starring as herself - 10, Fashion House, Tommy Boy).
Elsewhere, Jeff and Lester continue their own spy mission. Recurring guest star ANGUS MACFADYEN (Braveheart) appears as Nicholas Quinn.