Jo Harvelle - Plot

Plot

Jo Harvelle first meets Sam and Dean Winchester in the second season episode "Everybody Loves a Clown". The brothers look for her mother Ellen at Harvelle's Roadhouse—a saloon frequented by hunters—after she leaves a voice mail message on the phone of their deceased father, John Winchester. Throughout the second season, Jo appears to have romantic feelings for Dean, and, though he states that he also has feelings for her, he will not act on them. Against her mother's wishes, Jo later slips away from the Roadhouse to help the brothers on a hunt, though she ends up becoming endangered by a vengeful spirit and the brothers have to save her. Her mother, angry with the Winchester brothers, reveals to Jo that John's recklessness was responsible for the death of her father, which strains Jo's friendship with Sam and Dean. She later leaves the Roadhouse to live the life of a hunter. A demon possessing Sam later sows more dissent by claiming that John actually killed her father "to put him out of his misery" after he incurred fatal wounds, despite her father's pleas to see his wife and daughter one more time. Dean rescues Jo from the demon, and she then attempts to follow Dean in the search for Sam. However, Dean refuses to allow her to come. Dean tells Jo he will call her, but as he leaves, Jo quietly whispers, "No, you won't".

In the fifth season episode "Good God, Y'All!", Jo reappears with her mother Ellen in a small Colorado town called River Pass (The Roadhouse having been burnt down a the end of the second season). They plan to help Rufus, a demon hunter and one of Bobby's friends, kill the demons that have laid siege to the town. However, Jo and Ellen are separated in the chaos. Jo later finds and joins up with Rufus and other townspeople. Eventually, they attack Sam and Ellen, both of them appearing to be possessed by demons. Jo joins in with Rufus to torture the supposed "demon" out of a captured Sam with holy water and salt, but becomes doubtful when no demonic effects are present on Sam. Dean and Ellen arrive and, after a brief struggle, convince Jo and Rufus that War, one of the Four Horsemen of the Apocalypse, is responsible for making all the townspeople turn against each other by thinking that both sides are demons.

Jo and Ellen once again team up with the Winchesters in "Abandon All Hope...", where they help the brothers reacquire the Colt — a mystical gun rumored to be capable of killing anything — in order to kill Lucifer. Upon tracking his location to an abandoned town, they are confronted by the demonic Meg, who sends hellhounds after them. The hunters seek refuge in a supplies store, but Jo is mauled by a hellhound in the process. Dying, she suggests that they build bombs of salt and iron nails; using herself as bait, she can kill the creatures, allowing the rest of them to escape from the roof. Reluctantly, the Winchesters and her mother agree. Once the bombs are set in place, Dean says his farewells, and kisses her on her forehead and lips. Ellen, unable to leave her daughter's side, stays behind to unbar the doors knowing Jo would not be able to. However, Jo dies before the hellhounds enter, so Ellen detonates the bombs for her, destroying the store and killing the hellhounds.

Jo is mentioned in the reality-warped episode "My Heart Will Go On" though not seen on screen. Somehow the changes to history caused by Balthazar saving the Titanic from its destined sinking leads to neither Ellen or Jo dying in the hunt for Lucifer, with Ellen now married to Bobby Singer. She reports in periodically leading a group of hunters investigating the killings of Fate. Once the timeline is restored she is removed from the current reality.

Jo reappears in "Defending Your Life" as a spiritual witness called by the Egyptian god Osiris to see whether Dean is guilty or not. Eventually Osiris declares that Dean is guilty and orders Jo to kill him in exactly the same manner that Jo herself died. But before Jo can do anything, she disappears as a result of Sam killing Osiris.