What episode did cole die in charmed?

Cole Turner, played by Julian McMahon, dies in the episode titled "Being There," which is the 22nd episode of Season 4 of "Charmed." His death occurs after a dramatic confrontation with the Charmed Ones, where they ultimately have to vanquish him to protect the world from his evil side. This moment is significant as it marks a pivotal turning point in the series, affecting both the plot and the characters' emotional arcs.