Mare of Easttown creator knew how the show would end before writing the opening scene

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"I hope that they’ll be surprised, but in a really in a really good way and that they haven’t been cheated in any way," says Brad Ingelsby of the finale, airing Sunday. "We’ve invested so much time in this town and these people that I hope an audience trusts that we’ll do right, in terms of the ending. It’s not gonna be one of those endings where it’s like, 'If you blinked in Episode 1, it was that weird guy in the woods,' or something like that. It won’t be that type of ending. I hope the mystery is surprising and compelling, but I hope what they walk away with is that they got to spend time with the group of people that they got invested in and they cared about and were hopefully like them in some way. Hopefully watching Mare have to deal with this grief and cope and confront this thin, that’s haunted her will illuminate their own lives in some way. And hopefully it’s moving. That’s what I always try to have a story be. I want it to be moving, in some way, and I hope that happens with this one."