The premise: Hundreds of years in the future, the last surviving humans discover a way of sending consciousness back through time, directly into people in the 21st century, "travelers," who assume the lives of seemingly random people. They're also secretly working as teams to perform missions in order to save humanity from a terrible future. Armed only with their knowledge of history and an archive of social media profiles, the travelers who include an FBI agent, a single mother and a college student discover that 21st-century relationships are as much of a challenge as their high-stakes missions.
There are 3 seasons with 12 episodes per season. I got so hooked on it I had to binge several episodes. One Thurs when I was off work and had no specific errands to run or things to accomplish, I started watching at 9am and didn't stop until 12midnight, with a few short breaks to eat, use the bathroom, and take the dogs out! Its THAT good!
If you liked Sense8, Altered Carbon, or Black Mirror, you'll probably like Travelers too. If you're looking for a new series, I highly recommend it. If you watch it or have already watched it, let me know your thoughts.