As most thrillers go, its not a happy event that happens, Froggatt laughs.

She won a Golden Globe and nabbed three Emmy nominations for her performance on the beloved period drama.

I had never done a thriller before, Froggatt says.

Liar-E01-Joanne-Froggatt-as-Laura—Two-Brothers-Pictures-&-all3media-International-(53)—RT-

Joss Barratt/Sundance TV

Its very cool, its very cinematic.

The duo tell EW they wanted to do something a little more linear after two seasons ofThe Missing.

I would say, tonally, its different, Harry says.

But it does have those twists and those turns and surprises along the way.

Its not something thats too open-ended its a whole story, and a real roller coaster of a story.

Adds Jack: Youll get hooked.

And he wouldnt lie, would he?

Liarpremieres Wednesday at 10 p.m.