The connection between the doppelgängers in The Vampire Diaries and the supernatural world was a complex and intriguing storyline that unfolded over five seasons. As the seasons progressed, Elena and viewers alike searched for answers about the doppelgängers and their connection to the supernatural.
Centuries ago, there were powerful witches known as Travelers, with Silas and Qetsiyah being the most prominent among them. They wanted eternal love and created an elixir for immortality. However, this upset the balance of nature, leading to the creation of doppelgängers. These doppelgängers were exact replicas of the immortals and could die in their place, serving as a way for nature to restore balance.
The first doppelgänger introduced on the show was Tatia, who lived in the 10th/11th century. She was loved by both Klaus and Elijah Mikaelson, leading to complications and tragedy. Katherine Pierce, who later became a vampire, was another doppelgänger. Her blood was sought after for various spells and rituals.
Elena Gilbert, the series' protagonist, was also a doppelgänger. Her blood was powerful and could be used for magic. Her love triangle with the Salvatore brothers, Stefan and Damon, added to the intensity of the supernatural world.
Stefan, it turned out, was also a doppelgänger, revealed in the fourth season. Just as Elena had a connection to Katherine, Stefan had a connection to Silas. This further complicated the story and added another layer to the doppelgänger mythology.
Tom Avery was a Salvatore descendant introduced during season 5 (Damon and Stefan's father had an affair that resulted in a child.) Tom was a paramedic who lived in Atlanta, and he had no knowledge of his connection to the Salvatores or that he was a doppelgänger. Of all the doppelgängers, Tom was the least significant.
Throughout The Vampire Diaries and its spin-offs, The Originals and Legacies, the focus remained on the doppelgängers' significance.
Ultimately, the doppelgänger storyline came to an end as the series concluded. Elena's blood was used to break Klaus' curse, and Stefan sacrificed himself to save Mystic Falls. This marked the end of the doppelgänger saga, but their impact on the supernatural world would be remembered.