"Supernatural" I Know What You Did Last Summer (TV ... - IMDb
"I Know What You Did Last Summer," the ninth episode of Supernatural season four, serves as a critical, flashback-heavy turning point that reveals Sam's partnership with Ruby while Dean was in Hell. The episode introduces Anna Milton, a human who can hear angels, and marks the first appearance of the torturer Alastair, drawing praise for its emotional depth despite some criticism regarding the new Ruby's chemistry with Sam. For a detailed breakdown of the episode, visit IMDb .
