EXCLUSIVE: Riddick helmer David Twohy has been tapped to direct time-travel pic Replay at Relativity, I’m hearing. This is the previously untitled sci-fi script that the studio snapped up in July from screenwriter Joe Gazzam, who sold action-thriller Shadow Run to Sony and is scripting the Cliffhanger remake for Neal Moritz and StudioCanal. Story tracks Tyler Vaughn, a test subject in a quantum experiment who’s sent four days into the future, only to discover his son has been killed and he’s been fingered for the murder. When the day ends, he’s pulled back one day prior and realizes he must solve the mystery of his son’s death as he jumps backward, one day at a time, to stop it from happening on the day of the initial experiment.

Twohy’s at home playing in the sci-fi sandbox and is coming off of 2013’s Riddick, the third film he wrote and directed in his Pitch Black series starring Vin Diesel. Replay seems particularly suited to his strengths: He earned a WGA nom (with Jeb Stuart) for their adapted screenplay The Fugitive, another tale of a man wrongfully accused who goes on the lam to find a loved one’s killer, and he began his career by writing and directing 1992’s Timescape, starring Jeff Daniels as a father who goes back in time to save his daughter. Replay is being eyed for an early 2015 start, sources close to the project tell me.

Ahmet Zappa, Alan Gasmer, Peter Jaysen and Ryan Kavanaugh are producing Replay, while Tucker Tooley and Devon Schiff are aboard as executive producers. Relativity’s EVP Production Richard Potter is overseeing for the studio. Twohy is repped by ICM. Gazzam is repped by Paradigm.