Patton Oswalt voices a blue horse and Christopher Meloni is a cop-turned-hitman in Syfy’s new TV show ‘Happy!’

This Christmas, Christopher Meloni is bringing chaos to all — and to all, a violent night — with Happy!

The madcap new Syfy series (premieres Wednesday, 10 ET/PT) surrounds the former Law & Order: SVU star with complete disorder: Meloni’s Nick Sax is an ex-cop turned hitman who, following a botched job, comes into contact with an imaginary blue horse/unicorn named Happy (voiced by Patton Oswalt). Nick’s pulled out of his seedy life of drunkenness and debauchery by this chatty critter in order to find a young girl who’s been kidnapped by a perverted Santa.

More: Watch Patton Oswalt as an imaginary blue horse in a crazy ‘Happy!’ trailer

Also: Patton Oswalt faces wife’s death with heartbreak, body fluids in Netflix special

“Everyone likes to see this and every actor likes to play this, the antihero or the guy or girl who has this journey of self-discovery,” Meloni says. “Nick still doesn’t know how (messed) up he is — he only realizes superficially what he’s missed in life to a certain degree. There’s a lot of mining to do with this guy, what makes him him and his bad choices.”

USA TODAY talks with Meloni about the new show and his seasonal favorites.

Q: You’ve played some crazy characters before. Was Nick a culmination of those?

A: There was a real sense of exploration and freedom in everything we did, and it kept things getting crazier. It was a great playpen of anarchy and it plays to suits that I enjoy: physical comedy and quips. But also meaning and heart and all that.

Q: It’s like A Christmas Carol, with a goofy unicorn instead of three ghosts.

A: We absolutely thought it was Christmas Carol combined with It’s A Wonderful Life and maybe Quentin Tarantino and a little Sin City. It’s this mishmosh — you would never put those things together.

Q: There are a lot of holiday accessories strewn about. Do you have a favorite?

A: Nick Sax’s scarf, without question. It has “Feliz Navidad” on it — that just made us laugh because it’s so warm and cheerful and José Feliciano-esque.