Counterpart

Howard Silk (J.K. Simmons) is a lowly cog in the bureaucratic machinery of a Berlin-based United Nations spy agency. When Howard discovers that his organization safeguards the secret of a crossing into a parallel dimension, he is thrust into a shadow world of intrigue, danger, and double cross… where the only man he can trust is his near-identical counterpart from this parallel world.

Season two finds the Crossing closed and each Howard stranded in the other's world. As a cold war escalates between worlds and deepens the divide, both men find themselves growing increasingly like the other.