Philly’s Walnut Street Theatre Debuts New Sherlock Holmes Adaptation

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Bill Van Horn and Harry Smith in Sherlock Holmes: The Great Detective. Photo by Mark Garvin.

The Walnut Street Theatre, America’s oldest theatre, is currently home to a thrilling world premiere: SHERLOCK HOLMES: THE GREAT DETECTIVE. As a staple of Philadelphia’s cultural scene, the Walnut has once again delivered a production that blends classic literary intrigue with high-energy stagecraft. This adaptation, inspired by the timeless stories of Sir Arthur Conan Doyle, is an anchor of the theatre’s 217th season and offers a “whimsical mystery” that keeps the audience on the edge of their seats. I was fortunate to attend the opening night of a funny, entertaining show that kept my attention throughout. Read on for my full thoughts on Sherlock Holmes at the Walnut Street Theatre.

A Masterclass in Adaptation and Performance

The production is spearheaded by Bill Van Horn, who serves as both the playwright and director. Van Horn is a veteran of the Walnut stage, having previously adapted Sherlock Holmes – The Adventure of the Speckled Band. In a brilliant move, he also returns to the role of Dr. John Watson, providing a grounded, loyal, and humorous foil to the erratic genius of Sherlock Holmes.

The cast delivers standout performances across the board:

  • Harry Smith portrays the titular detective with a sharp, calculating energy that captures Holmes’ iconic brilliance.
  • Dan Hodge is perfectly menacing as Professor James Moriarty, the “criminal mastermind” who serves as Holmes’ ultimate arch-nemesis.
  • Mary Martello brings warmth and resilience to the role of Mrs. Hudson, Holmes’ long-suffering landlady.
  • Anna Bailey adds a layer of sadistic charm as Arabella Moriarty, James’ younger sister.
  • Dave Johnson rounds out the classic ensemble as the determined but conventional Detective Inspector Lestrade.

Spectacle and Atmosphere

The creative team has successfully transported 825 Walnut Street to the foggy streets of Victorian London and the snowy peaks of the Alps. Jason Simms’ scenic design is expansive, utilizing sets that move seamlessly from Baker Street to the continent. This is complemented by Natalia de la Torre’s intricate costume work and Amari Callaway’s wig designs, which perfectly capture the turn-of-the-century aesthetic.

The tension is dialed up by Christopher Colucci’s sound design, which creates an atmosphere of “exhilaration and thrills,” while Aly Docherty’s lighting design adds the necessary shadow and drama for a proper detective mystery.

A Personal Highlight

One of the most delightful moments of the night happened away from the stage. During the intermission, I had the chance to meet Fran Prisco. As one of my favorite actors, Fran has been a part of many terrific Walnut Street Theatre productions over the years. Even though he wasn’t in this specific show, seeing him there was a reminder of the tight-knit and talented community that makes Philly theatre so special.

Final Verdict

SHERLOCK HOLMES: THE GREAT DETECTIVE is an “uproarious mayhem” of a show that balances comedy, adventure, and suspense. Whether you are a die-hard Sherlockian or just looking for a night of world-class entertainment, this production is not to be missed.

  • When: Now through February 15, 2026.
  • Where: Walnut Street Theatre, Philadelphia, PA.
  • Tickets: Available at WalnutStreetTheatre.org or Ticketmaster.com.