While on the road, Dean and Sam read on the newspaper about the disappearance of three people in Lake Manitoc, Wisconsin. Once there, they use forged identity and meet Sheriff Jake Devins and later his daughter Andrea Barr and her son Lucas Barr. Dean and Sam are informed that the nearby dam will collapse sooner and submerge the town and the lake, and they conclude that there is a revengeful spirit in the lake. Their further investigation discloses a hidden secret from the past of three locals.
"Dead in the Water" is a dark episode of "Supernatural" and I particularly was glad to see Amy Acker, the "Fred" of "Angel", again on video. The intriguing story is well constructed and has a good resolution. My vote is eight.
Title (Brazil): "A Morte na Água" ("The Death in the Water")