"Something In The Water" is the seventh episode in the fourth season of Hunters (TV series).
At Lake Sunrise the demon Zaebos has summoned a Slavic Bagiennik to harvest souls by drowning tourists and locals. Stranger is that back in the 1800s witchunter Jebediah Samael killed a group Bagienniks at Lake Sunrise. The hunters (Dan, Will, Tara, Kisho, and Lee) along with Jess arrive at Lake Sunrise and while investigating are immediately attacked by the Bagiennik. Dan shoots it, and they escape. Meanwhile Will investigates the monster's folklore.