Lena Headey (“The Terminator: The Sarah Connor Chronicles,” Laid to Rest) will lead the cast in Simon Hunter’s (Mutant Chronicles) new Brit shocker Safe House, which is set to lens this coming March. Michael Ironside (Terminator Salvation) is also attached with offers out to Kate Mara (Iron-Man 2) and Michael Trucco (“Battlestar Galactica”). Safe House follows a team of US Marshals charged with protecting a mob-trial witness and her teenage daughter, Alice. Mother and daughter are relocated to an isolated compound high in the Californian Rockies. The location appears secure — outfitted specifically for witness protection — yet its past is steeped in mystery and violence. Producer Steve Iles of Spirit Pictures pitches it as Assault On Precinct 13 meets The Thing. Andy Briggs has written the screenplay. Image Engine, the Canadian VFX shop which created the aliens in District 9, was in talks to do the monster design, Deadline reported last year. Simon Bowles, who regularly works with Neil Marshall (The Descent), will be production designer. Check out the teaser poster inside.