The Colour of Blood (S01E05)

Title: The Shade of Crimson Plot: A notorious serial killer breaks free from a mental institution, setting his sights on a woman who appears to be the perfect target. However, beneath her unassuming exterior lies a dark secret, revealing that she is far from the innocent victim he anticipated. As their paths intertwine, a deadly game of cat and mouse ensues, challenging both their true natures. Also known as "The Carnation Killer" (US title)