The Postables are on a mission to deliver a soldier's letter from Afghanistan to a teenager who's being relentlessly bullied, while Oliver's estranged father surprises him with news that shakes him to his core.

When plans for Rita and Norman's long-awaited wedding begins falling apart days before the ceremony, their challenges inspire changes that make their wedding more meaningful. Meanwhile, Shane convinces Oliver that the team should urgently focus on finding clues to deliver a package containing a wedding dress.

Four postal detectives, with a mission to deliver previously undeliverable mail, set out to deliver a Christmas letter; while working at the dead letter office, the Postables investigate the story behind two-year-old divorce papers that have been lost in the mail; the Postables help deliver a soldier's letter from Afghanistan to a bullied teenager, while Oliver receives surprising news from his estranged father; postal detectives must decode a letter...

Nine strangers receive a list with their names on it in the mail. Nothing else, just a list of names on a single sheet of paper. None of the nine people know or have ever met the others on the list. They dismiss it as junk mail, a fluke - until very, very bad things begin happening to people on the list. First, a well-liked old man is drowned on a beach in the small town of Kennewick, Maine. Then, a father is shot in the back while running through...