When does Unknown return?

Unknown is a 2011 action-thriller film directed by Jaume Collet-Serra. It stars Liam Neeson, Diane Kruger, January Jones, Aidan Quinn, Bruno Ganz, and Frank Langella. The narrative centers around a professor who wakes up from a four-day coma and sets out to prove his identity. Released on 18 February 2011, the film received mixed reviews from critics and grossed $136 million against its $30 million budget.