It's called "Turn: Washington's Spies", its on AMC. I got the first season from my local library and it's pretty good so far. It's about the Culper Ring during the Revolutionary War.
BTW, you should really listen to the Hamilton soundtrack, it's a new musical out on Broadway all about Alexander Hamilton and it's really good (
@RobinSparkles can back me up on this). I sense that you're into history stuff and I reallyyyyyyyyyyy think you would like it. It's all like rap and hip hop and R&B music but it's so good. The lyrics are just so dense and intelligently written and full of historical events (The Revolutionary War, the Reynolds Pamphlet, the election of 1800, etc) and people (Aaron Burr, Washington, LaFayette, Jefferson, Madision, John Adams). This is the opening song:
The song "Right Hand Man" is also really good, it's when Washington is introduced into the show but it drops hints of so many historical events in one song. (This may seem like a random mention but Hercules Mulligan, who was apart of the Culper Ring, is a character in Hamilton, which is essentially why I picked up "Turn").
Ok that's enough Hamilton rambles for tonight :) But like for real, you should check it out.