There are several mysteries threaded through HBO’s absorbing limited series Mare of Easttown: Who is holding Katie Bailey ( Caitlin Houlahan) captive? What’s the deal with those shifty-looking priests? Why is Kate Winslettalking like that? Chief among them, though, is the central question driving Winslet’s rumpled detective, Mare: Who killed teen mom Erin McMenamin ( Cailee Spaeny), then dumped her body in the creek in Sharp’s Woods? We’re currently at Mare’s halfway point, with just three episodes left—meaning that the show’s had a chance to establish plenty of possible suspects and red herrings. With that in mind, 11