Counterpart (TV series 2017-2019)

Counterpart is about a mysterious world hidden beneath the surface of our everyday existence. Howard Silk 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. The show explores themes of identity, fate and lost love, posing the eternal question, "what if our lives could have been different?" - IMDb