Signed, Sealed, Delivered

It's the start of a new week for the team of intrepid postal detectives tasked with tracking down the recipients of undeliverable mail. Amongst the hustle and bustle of shuffling letters, Oliver O'Toole (Eric Mabius), the rigid leader of the team, makes his way to the office. As he moves through the mailroom, he bumps into department newcomer and resident technophile Shane McInerney (Kristin Booth). As Oliver and Shane arrive at the dead letter office they are greeted by the free-spirited, "girl next door" Rita Haywith (Crystal Lowe) and the nerdy but lovable Norman Dorman (Geoff Gustafson). It's a particularly special day at for the dead letter team as they prepare to welcome their new supervisor, the legendary Theresa Capodiamonte (Valerie Harper)!

A mangled letter describes a young woman's search for a soldier who saved her life and helped her escape Afghanistan during the Battle of Kamdesh. The Army officer is untraceable by normal means and the team must find him, even if he does not want to be found.

The postal detectives track clues to deliver a love letter that can change lives, while their strict new supervisor is on a journey of her own.

The #POstables hunt for clues to deliver a package that could change a family forever.

In "The Edge of Forever," the Dead Letter Office detectives are dealt their most heart-wrenching challenge yet when they receive an unusual package with a letter from a deceased woman. The Postables help the family on a dramatic journey to piece together clues from their past, so they can move towards a better future.

In "The Future Me," when the postal detectives discover a letter postmarked with a future date, it sets off a chain reaction that leads them down a surprising, emotional journey. As Rita prepares for the Miss Special Delivery pageant?and faces threats from Glynis Rucker (special guest star Marilu Henner), an intimidating supervisor whose daughter is also competing for the crown. Oliver, Shane and Norman find themselves in the middle of a unique couple's struggle for acceptance.

In "Something Good," the Postables track down a wildly talented but anonymous singer/songwriter using only the lyrics of his undiscovered song, taking on an investigation like no other. As the team follows the song's clues, they quickly unravel the details of a fated night, where two lives were changed. Meanwhile, an old friend of Shane's (guest star Valerie Bertinelli) arrives and stirs things up in the DLO.

the Postables follow clues to deliver not only a letter, but an unspeakable truth that has been buried for years. With special approval from visiting supervisor Rebecca Starkwell (guest star Valerie Bertinelli), the team's investigation leads them to stunning revelation that quickly becomes a matter of life or death

Oliver and Shane investigate an unusual case that leads them to a bank vault. As Rita prepares for the statewide Miss Special Delivery competition with Norman?s guidance, Oliver and Shane discover they're locked in the vault without enough air to survive. There, they unearth a timeless treasure that will change lives if they don't lose their own.

Norman meets a family member who changes his life as the Postables make a delivery that transforms a family.

With a duty to deliver every last letter before Christmas, the beloved quartet of post office detectives are working around the clock to redirect Santa's mail just as Oliver runs into his former Sunday school teacher. When they receive an emotional last-minute plea not meant for Saint Nick, but instead written to God, they must delay their own travel plans to make sure one little girl doesn't lose her Christmas joy-something Oliver and Shane are also struggling to find as they each face painful holiday memories. With a little guidance from a mysterious post office volunteer, Jordan, the Postables are more surprised than anyone to discover they've been a part of more than one miracle on this Christmas Eve.