Counterpart (2017)

Howard Silk, a seemingly insignificant employee at a bureaucratic UN agency, finds himself at a pivotal moment in his life, burdened by past regrets. Everything changes when he uncovers a hidden truth about his workplace: it serves as a gateway to a parallel dimension. This revelation thrusts Howard into a web of intrigue, forcing him to navigate the complexities of dual identities and shadowy conspiracies, challenging everything he thought he knew about his existence and the world around him.