Charmed (1998)

S3E19 The Demon Who Came in from the Cold

Title: The Demon Who Came in from the Cold Plot: Cole assumes the identity of Belthazar to penetrate a sinister online organization that aims to dominate global information access. While he works undercover, the sisters face the challenge of defeating the warlock who masquerades as the firm's manager, all while keeping Cole's true mission under wraps.