It seems like the majority of Hallmark fans agree… Tamera Mowry-Housley’s “Haunted Harmony Mysteries: Key to the Castle” is a hit!
The third (and hopefully far from last) story in the series — following “Murder in G Major” (2023) and “Buried at C” (2025) — the newest installment features the return of music teacher and ghost whisperer Gethsemane Brown (Mowry-Housley) along with Risteárd Cooper as Eamon, Marco Grazzini as Griff and Adam Fergus as Inspector O’Reilly.
As for the story, “[w]hen a ghost hunter show comes to town, it’s up to Gethsemane and Eamon to solve the unexpected murder of the host, allowing the brand-new spirit to cross over,” Hallmark explains.
If you haven’t seen it yet, then you might want to check it out A.S.A.P. If you have watched it, then you’ll surely be interested in something that the story’s star is curious about.
What’s Your Favorite Part of Hallmark’s ‘Key to the Castle’ Movie?
“My heart is so full seeing all of your love for Haunted Harmony Mysteries: Key to the Castle! ✨,” Tamera wrote along with an Instagram post that she shared on Wednesday, June 3.
The star’s post also included quotes from fans of the new story, making it clear that plenty of people enjoyed what they saw. The comments were along the lines of “bravo to everyone involved” and “[m]y favorite mystery on Hallmark!”
Tamera added, “Every cast member and crew member worked so hard to make this story special, and I’m so grateful you’ve embraced it. … 💜 If you haven’t watched yet, you can stream now on @Hallmarkplus!”
At the same time, Tamera noted that she’s curious about one thing, adding, “If you’ve watched it, I’d love to know what your favorite part of the movie is.”
The Stars, Scenery and Story All Get Thumbs Up
When Tamera shared her Instagram post about “Haunted Harmony Mysteries: Key To The Castle,” it prompted plenty of messages from fans.
One person left a comment, writing, “Loved every minute of it but anytime Eamon and Gethsemane are working together is simply magical ✨🩷 this is probably my favorite out of all 3 movies! So good 🫶🏼”
“Just love these movies, the banter & wisecracks are brilliant. Amazing cast too 😍,” someone else added.
A third social media user wrote, “It had some great plot twists!”
Beyond that, the movie earned a positive review from Decider, which notes that “[m]aybe it’s the idyllic Irish locale, maybe it’s the unlikely but delightful relationship between human Gethsemane and ghost Eamon, or maybe it’s the clever conceit of a ghost helping to solve another ghost’s murder, but Key To The Castle is a well-written mystery that’s utterly satisfying to watch.”
Decider also points out that, “in this franchise, [Tamera] has found her perfect partner, and it’s not even a romantic one. The rapport between Gethsemane and Eamon is a genuine friendship and allows for both actors to shine. … Haunted Harmony Mysteries: Key To The Castle is another winning installment of what has proven to be a reliably strong mystery series on the Hallmark Channel. STREAM IT!”
