Newly released show. 1st episode aired Yesterday.
The premise of the show is basically about an alternate universe that is almost identical to one another, with minor differences between counterparts. Only a very select few know that there is an alternate universe or that they have a counterpart. Both universes have a "crossing point" which acts like a border, people are strictly prohibited from traveling between the 2 universes, except for the secret agents that may be granted a "visa". Anyways, JK simmon's character discovers a secret faction in his world that has an unknown agenda, but what he does know is that they want to kill agents from the other universe. So, he gets a visa to travel and warn the other side. Very well done show and as always, JK Simmons knocks it out of the park with his character.