Jeremy Johns was leaving Los Angeles to propose to his girlfriend when the city was sent to hell by the Senior Partners of Wolfram & Hart. In hell, Jeremy was rescued from a pack of werewolves by a vampire-with-a-soul named Spike and his demonic friend Illyria. Jeremy joined the group of humans following Spike and Illyria for protection, and began functioning as Spike's right hand man, despite Spike's continual insistence on referring to him as "Jerry".
Spike's team was kidnapped and held captive by the demon Non, who fed off the lifeforce of humans. When Non began using Jeremy's lifeforce, Illyria horrified Spike by punching a hole clean through his chest, believing that she was doing a good thing. Spike buried Jeremy under a grave marked "Jeremy Johns. A Friend."
When Angel's death caused the Senior Partner's to reverse time and undo the Fall of Los Angeles, Jeremy was resurrected along with everyone else, albeit with full recollection of their time in hell. He finally reached his girlfriend and proposed.
Jeremy later appeared at a Last Angel in Hell convention, where he was transformed into a Kung Fu master by the ritual of Janus.
Some time later, Jeremy was remotely possessed by Tor a demon working as a new liaison to the Senior Partners for Wolfram and Hart's Las Vegas Branch. Jeremy was used to approach Spike and prevent him from "killing the messenger." Drusilla murdered the demon in his true form, which unfortunately left him stuck in Jeremy's body. Jeremy was left in an unconscious state, and was taken by Spike. Later on witchWillow Rosenberg moved Tor into the body of a dead snake. In an attemt to rescue Beck and Betta George, Jeremy is attacked by Drusilla as a response to seeing Spike and Beck kiss. Jeremy does survive though.