"Zum alten Bullen" is the eighteenth installment in the captivating series "Der Sherlock Holmes-Adventkalender: Der Heilige Gral," released by Der Sherlock Holmes-Adventkalender. This thrilling audio adventure, produced by Ignatius Hörbücher, invites listeners into the world of Sherlock Holmes and Dr. Watson as they journey through the mystical landscapes of Wales. In this episode, the renowned duo visits the presumed site of the legendary Camelot and the Round Table, unraveling clues that lead them deeper into their quest. With a runtime of just under 19 minutes, this episode is a perfect bite-sized mystery to enjoy during the festive season. Released on December 18, 2023, "Zum alten Bullen" is a delightful addition to the series, offering fans a fresh dose of intrigue and adventure. The album features seven engaging chapters, each building upon the last to create a compelling narrative that keeps listeners on the edge of their seats. Whether you're a longtime fan of Sherlock Holmes or new to the series, this episode promises an exciting and immersive experience.