Agatha Christie adaptations can be like visits with an old friend.

The stories are familiar, the characters recognizable, and the ending perhaps vaguely remembered.

Yet each retelling offers the possibility of a fresh perspective, or simply the pleasure of revisiting a mystery whose solution we may already know.

Agatha Christie’s “Murder on the Orient Express” makes a stop at The Pennsylvania Playhouse, where Ken Ludwig’s stage adaptation, directed by Mark A. Stutz, brings one of the author’s most celebrated mysteries to life as part of the theater’s 2026 season.

Set aboard the luxurious Orient Express in 1934, the story brings detective Hercule Poirot face to face with a murder, a train trapped by snow, and a compartment full of passengers harboring secrets. When a passenger is found dead, Poirot must sift through conflicting accounts and concealed motives to identify the killer.

Beneath the familiar whodunit lies the tragedy of Daisy Armstrong, whose death provides the emotional foundation for the story’s deeper questions about justice, revenge and the limits of the law.

Stutz, working with assistant director Meg Pierre, meets the challenge of bringing Christie’s intricate mystery to an intimate theatrical space. The audience feels close to the action, almost another group of passengers watching suspicion spread through the train.

Rather than relying on spectacle, the production makes effective use of the theater’s compact setting, turning its limitations into an asset.

The set design by Brett Oliveira is particularly resourceful. Settings, including a train station and dining room, give way to the passengers’ individual bedrooms as the scenery folds and shifts. The transitions keep the action moving while preserving the sense of confinement essential to the story.

In a welcome surprise, a curtain along the wall opens to reveal an unexpected extension of the performance space. The discovery adds another dimension to the staging, demonstrating how a modest theater space can offer moments of visual ingenuity.

Oliveira’s lighting and Amanda Haag’s sound design further establish the atmosphere. Blue lighting and carefully-placed spotlights create a sense of unease, while a persistent, whistling wind follows the characters through much of the play. The sound evokes the winter landscape beyond the train and reinforces the passengers’ isolation.

They cannot escape the storm, but neither can they escape the secrets that bind them together.

The cast is well-settled in its roles, carrying forward Christie’s tradition of memorable characters, concealed motives and the suspicion that no one is quite who they seem.

The range of accents evokes many corners of Europe on the Orient Express, giving the passengers distinct identities. The performances also strike a pleasing balance between suspense and comedy, allowing moments of humor to emerge without diminishing the mystery.

Shaun Hayes does justice to one of Christie’s most beloved characters. With his dignified bearing and, of course, the familiar mustache, Hayes makes Poirot authoritative and approachable.

His measured presence keeps the detective in command of the investigation while leaving the audience to wonder how much he has already deduced.

Hayes’s final monologue revelation is the bow on a neatly-wrapped gift, bringing the many threads of the mystery together with precision and flair.

Explaining an intricate plot without losing an audience’s attention is no easy task, but Hayes delivers, giving the detective’s final resolution the clarity and momentum it requires.

Kate Hayes is particularly effective as Helen Hubbard, a saucy passenger from Minnesota. She finds the comedy in Hubbard’s personality without reducing the portrayal to a caricature.

Her timing provides welcome relief from the mounting suspicion, and the humor feels rooted in the character rather than imposed upon it.

There is an added pleasure in watching Shaun and Hayes, a married couple, share the stage. Although their characters are not romantically involved, the actors’ ease and familiarity are evident. Their natural chemistry lends a comfortable spontaneity to their performances without distracting from the story.

Keith Moser returns to the stage as Monsieur Bouc following a six-year hiatus from area theater. You wouldn’t know it from his performance. Moser appears entirely at home onstage, bringing an ease and confidence to the role that makes his return feel less like a comeback than a continuation.

His performance is a reminder that stage presence does not disappear simply because an actor has stepped away for a time.

Bryanna Pye makes a strong impression as Countess Elena Andrenyi. In her exchanges with Poirot, Pye gives the countess a forceful presence, and her performance comes into sharp focus during a pivotal character revelation.

The shift adds impact to the moment, prompting the audience to reconsider what it thought it knew about her.

Mariel Letourneau plays Mary Debenham, Joey Troiano portrays Hector MacQueen, and Joemichael Luciano plays Michel.

Jen Rarick portrays Greta Ohlsson, Doug Ace plays Colonel Arbuthnot, and Travis J. Nugent portrays Samuel Ratchett.

Together, the ensemble supplies the distinct personalities, conflicting accounts, and competing motives that make Christie’s mystery work.

Without spoiling an ending that many audience members may already know, Stutz’s production invites us to consider the line between justice and revenge.

What happens when people lose faith that the law will hold the guilty accountable?

At Pennsylvania Playhouse, Stutz and the cast bring Christie’s familiar tale to life in a setting that places the audience close to the suspects and their secrets.

The production makes room for suspense and humor while allowing the story’s darker moral questions to linger beyond the final reveal.

Like a visit with an old friend, the journey is familiar. The pleasure lies in discovering what a new telling reveals.

“Murder on the Orient Express,” 7:30 p.m. Oct. 9, 10, 16, 17, 23, 24; 3 p.m. Oct. 11, 18, 25, The Pennsylvania Playhouse, 390 Illick’s Mill Road, Bethlehem. 610-865-6665, http://www.paplayhouse.org/