A one-hour drama series based on the 2011 Liam Neeson film Unknown is in development, with the actor on board as an executive producer.

The 2011 film, directed by Jaume Collet-Serra, followed Neeson's character Martin Harris, a doctor who after losing his memory in a car accident, wakes up to find his identity taken and being the target of mysterious assassins.

Collet-Serra will also direct and executive produce the follow-up series, which would pick up from the events of the film and follow a new lead character who is thrust into a dangerous adventure.

Sean Finegan (Free Fall) will write the pilot and will executive produce. Karl Gajdusek (Stranger Things) and Speed Weed (Arrow) will also serve as executive producers and showrunners. Ethan Erwin, Alex Mace and Hal Sadoff of Dark Castle are also executive producers, alongside Erik Olsen (The Dirt) and Neeson.

The 2011 movie, written by Oliver Butcher and Stephen Cornwell, was adapted from the 2003 French novel by Didier Van Cauwelaert (published in English as Out of My Head). The film grossed $136 million on a $30 million budget.