1) The series introduces John Doe, a killer who stalks and becomes obsessed with his victims. He views the world in black and white except for the objects of his obsession, which appear in color.
2) In the first episode, John Doe becomes fixated on a girl named Kaitlyn. He watches her from afar and leaves flowers at her door. However, when she rejects his advances, his anger grows.
3) At the end of the episode, John Doe confronts Kaitlyn in her home just as her boyfriend Eric is outside, unable to help her. This cliffhanger sets up the central conflict between John Doe and his victims in the following episodes.