The Vampire Diaries Season 4 Episode 17 Because the Night

Elena and Damon embark on a road trip to Denver in search of Katherine. Along the way, they reminisce about their past and share their hopes for the future. Meanwhile, back in Mystic Falls, Stefan tries to help Bonnie overcome her guilt about Abby's death, and Caroline and Jeremy uncover some startling information about Professor Shane. As the night wears on, everyone's lives are changed forever. This episode is full of emotional turmoil and surprising revelations, as the characters come to grips with their past and prepare for an uncertain future.