"Dead in the Water" is the third episode of Supernatural 's first season, originally airing on September 28, 2005, and focusing on Sam and Dean Winchester investigating mysterious drownings at Lake Manitoc. The episode highlights Dean's empathy through his connection with a traumatized boy while hunting the vengeful spirit of a child drowned decades prior. For a detailed breakdown of the episode, visit Supernatural Wiki . Dead In The Water | Supernatural Wiki | Fandom