Oliver is delighted that his team's new postal office supervisor is his late grandfather's famous former colleague, Theresa Capodiamonte. She can see his own excellence when they receive a cryptic letter from nine year-old Owen. The spelling and message didn't allow regular delivery, but Oliver's team works out it's to a rest home, presumably to his granny. They find her, but she denies and refuses the letter. Oliver realizes that's a ruse to protect the rascal, who in fact is Casey, key witness against a drug lord, in witness protection with his family, but doing a fugue to celebrate granny's birthday, and the presence of an undercover fiend. Written by KGF Vissers

While high-flyer Oliver and his team wonder about his annual assessment, for the first time by the legendary supervisor, she finally gets a shot at her other dream, acting. Oliver realizes that a four year old letter, too badly battered to be delivered, containing a non-stamped one inside, has enough clues to be handed to the military post at a fort, as it's destined to a former Afghanistan fighter, nick-named Buzz. Captain Hopper clearly doesn't give such letters due attention, so the team finishes the case, working with the author, Afghan Samila, to find her savior trough his mother and pastor. Written by KGF Vissers

The postables gain a new Supervisor Cora Brandt who implements stricter policies and procedures as they try to track down clues that leads them to a ranch to deliver a love letter that can potentially change lives. However, as Oliver and Shane (Kristin Booth) grow closer to unfolding their latest mail mystery, things heat up between the two on the dance floor. Meanwhile, Rita is inspired to pursue her love of writing, penning a new novel that Cora becomes captivated by. Written by Hallmark Channel

Oliver's team works out a package, lost in the mail years ago, containing a painting and an accompanying letter, are from Danny Barrett to his estranged father Henry, who effectively chased the then knave by discarding his artistic ambitions in favor of carrying on the family garage. The painting proves revealing in several ways, both timely and tragically late. Rita's thick novel arouses interest, but to her horror the autobiographic elements are obvious to all except Norman, the obviously object of her affection. Oliver surprises dancing partner Shane by ending the course at the dance school, which has been won in a bet by Ramon Rodriguez. Written by KGF Vissers