: Stefan wakes in transition and accidentally kills his father during a struggle. The smell of his father's blood triggers his predatory instincts, causing him to feed and complete his transformation.
: Damon reveals to Stefan in the present that his century-long hatred isn't because Stefan made him a vampire, but because Katherine chose to turn both of them instead of only him. Power Struggles in Mystic Falls the vampire diaries season 1 episode 20
John Gilbert continues his campaign against the tomb vampires. In a major blow to the characters, he murders Pearl by staking her, leaving Anna devastated. : Stefan wakes in transition and accidentally kills
: Desperate not to be alone, Stefan forced Damon to feed on a young girl, completing Damon's transition against his initial wish to die. Power Struggles in Mystic Falls John Gilbert continues
Alaric and Damon investigate a house linked to John Gilbert, hoping to find Alaric's missing wife, Isobel. While they don't find her at the house, the episode ends with Isobel suddenly appearing to Alaric at the Mystic Grill. or what happens next in the Season 1 finale
: While trying to rescue Katherine, both brothers were shot and killed by their own father, Giuseppe Salvatore. They died with Katherine's blood in their systems—Damon drank it willingly, while Stefan was secretly compelled for weeks.