Series about portals to other worlds

List of the best series about portals to other worlds: Counterpart, Stranger Things
In the top there are new series of 2017, a plot description and trailers for series that have already been released.
Counterpart (2017)
Mark8.6 (imdb: 8.1)
Genrefantastic, thriller, drama
CharactersPartners, Special agents
PlaceParallel worlds, Portals to other worlds
StyleAtmospheric, Fancy

Howard Silk is a lowly cog in a bureaucratic UN agency who is turning the last corner of a life filled with regret when he discovers the agency he works for is guarding a secret: a crossing to a parallel dimension.

Stranger Things (2016)
Mark9.8 (imdb: 8.7)
Genrehorror, fantastic, thriller, fantasy, melodrama, drama, detective
CharactersChildrens, Monsters
PlotSupernatural, Adventures, Missing people, Investigation, Abduction, Superpowers
PlacePortals to other worlds, Parallel worlds, School, Small towns
StyleNetflix, Atmospheric, Popular, Spectacular, Fascinating, Worth watching

When a young boy vanishes, a small town uncovers a mystery involving secret experiments, terrifying supernatural forces, and one strange little girl.