Haunted Harmony Mysteries: Key to the Castle on Hallmark Channel: Release Date, Cast and Trailer

Hallmark Channel’s mystery and mayhem lineup in the month of May continues with Haunted Harmony Mysteries: Key to the Castle featuring Tamera Mowry-Housley, Risteard Cooper and Marco Grazzini in Haunted Harmony Mysteries: Key to the Castle.

So far we’ve seen Alison Sweeney and Victor Webster in Best Served Cold: A Hannah Swensen Mystery and True Justice: Eye for an Eye featuring Katherine McNamara, Markian Tarasiuk, Nikki DeLoach and Benjamin Ayres.

Here’s what you need to know about the latest installment of Haunted Harmony Mysteries.

What is Haunted Harmony Mysteries: Key to the Castle about?

Here’s the synopsis from Hallmark Channel:

“When 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.”

Who is in it?

Haunted Harmony Mysteries: Key to the Castle features Tamera Mowry-Housley (Scouting for Christmas, Inventing the Christmas Prince, Sister Sister) as Gethsemane, Risteard Cooper (Quiz, Extra Ordinary) as Eamon and Marco Grazzini (Christmas Unwrapped, Virgin River, Christmas Under the Lights) as Griff.

How to watch Haunted Harmony Mysteries: Key to the Castle

Haunted Harmony Mysteries: Key to the Castle premieres Saturday, May 30, at 8pm ET/PT on Hallmark Channel. The movie will be available to stream the following day on Hallmark Plus.

Hallmark Channel and Hallmark Mystery are included in many cable TV packages. You can also access Hallmark Channel and Hallmark Mystery via Philo, Sling TV, Frndly TV, Hulu with Live TV, YouTube TV and Fubo. Hallmark Plus is a standalone streaming service that requires its own subscription; new movies and series are available to stream on the platform day after they air.

Watch the trailer

You can watch the preview and sneak peek below.