As the team races to find Joe, the kidnapper—who might connect to season 2—reveals his face.

It monitors your sleep stats without a wearable.

Do you remember this photograph? In the United States, people have taken pains to banish it from the record of September 11, 2001. The story behind it, though, and the search for the man pictured in it, are our most intimate connection to the horror of that day.