Mison said in a recent interview that in the two-hour Season 1 finale, airing Monday at 8 p.m. EST, "There will be so many revelations and so many shocks that you'll want to stay up and scream at a wall and probably hit your head against a wall and so many surprises that you're gonna kick yourself that you didn't see some of these coming."
It might sound dramatic, but the actor said he believes the fans will be surprised because of clues they likely missed along the way.
"The seeds have been sewn throughout the season, clues as to what's coming, and as far as I know nobody's really guessed anything," Mison said.
"Sleepy Hollow" is described as a retelling of the Washington Irving short story but set in the modern day. Ichabod has awoken two centuries after being killed in the Revolutionary War. He must adjust to this new time period, battle the headless horseman and prevent the looming apocalypse.
"There's nothing else like it really," Mison said. "If you're a fan of procedurals then you'll like it. If you're a fan of horror then you'll like it."
Plus it's funny, especially as Ichabod tries to get comfortable in the 21st century. One especially humorous scene features him pouring his heart out to the OnStar voice in a car.
The cast and crew are on hiatus before Season 2 begins filming, and Mison said he can't wait to return to work.
"After a very, very strenuous hardworking season it's so nice that I haven't left it thinking, 'I need to go and lie down,'" he said. "Instead it's that I can't wait to find out what's going to happen."
"Sleepy Hollow" is the 31-year-old actor's first job in America. His work on the show has received praise from critics and put him on various 2013 lists of rising stars and actors to watch.
When asked whether he feels as though he's on Hollywood's radar, he's embarrassed but admits, "You're certainly aware of doors being opened."
"I wish I'd come to American sooner," he said. "Everyone's been delightful. Yes, I think it's safe to say 'Sleepy Hollow' has changed my life. It's delightful."
Follow Alicia Rancilio on Twitter at (at)aliciar