The actor will appear alongside stars including Sophie Okonedo, Peter Firth and Aidan Gillen in the series, which focuses on the disappearance of a young girl from an idyllic community.
Speaking to Digital Spy about the project, Spruell explained: "It's great because [in] this quaint village suddenly the facade comes down and the monsters are shown. I think it could be really exciting.
"On the face of it, it's like a Midsomer Murders, but I'd say it's much more The Killing. You get to kind of meet a whole range of people and work out how they are connected to the crime that is taking place. You see all their personal situations and the difficulties they are facing."
However, Spruell was not prepared to suggest that Mayday will become as popular as the Danish format.
"It'd be stupid and arrogant to say it's going to be as big as The Killing is," he noted. "I think The Killing is brilliant. If we can get anywhere near that, it'll be wonderful. That's a tall ask. We're gonna try, dammit!"
Spruell is currently starring in movie Snow White and the Huntsman, which also features Kristen Stewart, Charlize Theron and Chris Hemsworth.
The fairytale film is released in the UK and US on July 1.