In Signed, Sealed, Delivered: From the Heart, the “POstables,” Eric Mabius (Ugly Betty), Kristin Booth (Orphan Black), Crystal Lowe (Smallville) and Geoff Gustafson (Primeval: New World) discover a 200-year-old Valentine that could change history. Watch a promo, below.

The investigation of a damaged letter leads them to a public figure who could be brought down by its contents. And in the aftermath of Valentine’s Day, Oliver, Shane, Norman and Rita each deal with heartbreaking circumstances. Signed, Sealed, Delivered: From the Heart premieres Sunday, February 21, 2016, at 9:00pm ET/PT, on Hallmark Channel.

Here is Hallmark Channel’s synopsis of Signed, Sealed, Delivered: From the Heart:

“SIGNED, SEALED, DELIVERED: FROM THE HEART”
SYNOPSIS

With Valentine’s Day approaching, Oliver O’Toole, charming leader of a team of postal detectives devoted to tracking down recipients of undeliverable mail, opens the investigation of a mysterious 15-year old lost letter. Working closely with technophile Shane McInerney, Oliver tracks the letter’s history, uncovering a dramatic tale of young love, perceived betrayal and murder. When he discovers the letter contains information that could potentially destroy a local politician, Oliver finds he also has a personal connection to the case. Meanwhile, free-spirited Rita Haywith and research expert Norman Dorman discover a 200-year-old, homemade Valentine’s Day card, whose contents could have an enormous impact on American history.

As the lovable team of postal-workers-turned-detectives embark on their missions, the Valentine’s Day holiday stirs up insecurities surrounding their romantic lives. When sparks begin to fly between Oliver and Shane, a misunderstanding arises, threatening their budding romance. And when Rita is given a prestigious United States Postal Service honor, she is called out of town, leaving her bewildered boyfriend Norman alone on the holiday. As they each deal with personal heartbreak, Oliver, Shane, Rita and Norman spend Valentine’s Day fulfilling their postal duties – and wondering if love will find its way into their hearts

Watch this Hallmark Channel promo for Signed, Sealed, Delivered: From the Heart.

Here is the Hallmark Channel press release, with more details:

“SIGNED, SEALED, DELIVERED: FROM THE HEART” KICKS OFF 2016 SLATE OF FRANCHISE MOVIES ON HALLMARK MOVIES & MYSTERIES FROM “TOUCHED BY AN ANGEL” EXECUTIVE PRODUCER MARTHA WILLIAMSON

“Signed, Sealed, Delivered: From the Heart” Premieres Sunday, February 21 on Hallmark Movies & Mysteries

STUDIO CITY, CA – February 1, 2016 – Hallmark Movies & Mysteries announces four more movies in 2016 from the incomparable storyteller and Executive Producer Martha Williamson. “Signed, Sealed, Delivered: From the Heart” marks the third season for the franchise staring Eric Mabius, Kristin Booth, Crystal Lowe and Geoff Gustafson, premiering on Sunday, February 21 at 9pm ET/PT, 8C.

“Our longstanding relationship with Martha Williamson is something we treasure at Crown Media Family Networks,” said Michelle Vicary, Executive Vice President, Programming, Hallmark Channel and Hallmark Movies & Mysteries. “Each ‘Signed, Sealed, Delivered’ movie takes our audience through a compelling, emotional journey that lifts our audience and grounds us simultaneously. We are honored to continue sharing Martha’s passionate storytelling and vision for this beloved franchise with four more movies this year.”

In “Signed, Sealed, Delivered: From the Heart,” the beloved POstables Eric Mabius (“Ugly Betty”), Kristin Booth (“Orphan Black”), Crystal Lowe (“Smallville”) and Geoff Gustafson (“Primeval: New World”) discover a 200-year-old valentine that could change history, while their investigation of a damaged letter leads them to a public figure who could be brought down by its contents. And in the aftermath of Valentine’s Day, Oliver, Shane, Norman and Rita are each dealing with heartbreaking circumstances.

“I’m privileged to continue the ‘Signed, Sealed, Delivered’ journey together with Bill Abbott, Michelle Vicary and the Crown Media family,” said series creator and Executive Producer Martha Williamson. “We’ve planned some wonderful surprises for the POstables in the next four movies, many of which reflect the state of our hearts in troubling times, and I look forward to sharing them with you.”

“Signed, Sealed, Delivered” is a comedic drama that follows the lives of postal workers who transform themselves into an untraditional team of detectives to track down intended recipients of undeliverable mail. Their missions take them out of the office into an unpredictable world where redirected letters and packages can save lives, solve crimes, reunite old loves and change futures by arriving late but somehow on time.

The movies are produced by Muse Entertainment in association with MoonWater Productions. Executive producers are Martha Williamson, Joel S. Rice, Harvey Kahn and Michael Prupas. Harvey Kahn is the producer. Lynne Stopkewich directs. Marcie Gold and Brandi Harkonen serve as Co-Executive Producers. Allen Lewis and Marnie Young are Supervising Producers. Story by Martha Williamson and Brandi Harkonen. Teleplay by Martha Williamson. Created by Martha Williamson.

ABOUT HALLMARK MOVIES & MYSTERIES

Along with sister network Hallmark Channel, Hallmark Movies & Mysteries is the second 24-hour linear channel under the Crown Media Family Networks umbrella. Distributed in both (HD) and standard definition (SD) in 64 million homes across the United States and one of the fastest growing networks in cable, Hallmark Movies & Mysteries is a leading destination for quality family friendly entertainment. Launched in 2008 as Hallmark Movie Channel, the network underwent a brand evolution in fall of 2014 when it transitioned to become Hallmark Movies & Mysteries. True to its name, the channel brings the lighter side of the suspense and mystery genres into focus with rich, dramatic, and thought-provoking storytelling. The network’s programming lineup features a unique mix of original movies, presentations from the acclaimed Hallmark Hall of Fame library, and such time-honored acquired series as Murder She Wrote, Matlock, Hart to Hart, and Diagnosis Murder. The channel is also home to annual 8-week holiday programming event, The Most Wonderful Movies of Christmas, which helps viewers celebrate the season with new original movies and all-time classics like A Christmas Carol; Holiday Affair; Babes in Toyland; and Christmas in Connecticut. Crown Media Holdings, Inc. (NASDAQ: CRWN) owns and operates Crown Media Family Networks.

What do you think? Are you a fan of the Signed, Sealed, Delivered TV movies? Will you be tuning in for Signed, Sealed, Delivered: From the Heart? Tell us!