The finale of Supernatural, titled "The Winchesters," provides closure for Dean's character. Despite mixed reactions from fans, the episode gives Dean the ending he deserves. Dean dies during a vampire hunt but is then taken on a journey through the multiverse, where he can alter his parents' destiny. He ensures that young John and Mary Winchester are equipped with knowledge and weapons to fight against evil and have a happier ending.

Although fans had differing opinions about the series finale, The Winchesters serves as a thoughtful epilogue to Dean's story. In this spin-off/prequel series, Dean narrates the story of younger versions of John and Mary Winchester, who begin hunting together and fall in love. Dean works behind the scenes to protect his family from an army of monsters that threaten to destroy their chance at happiness. By giving John a note from his deceased father and encouraging John and Mary to write their own destinies, Dean changes their lives for the better. The finale of The Winchesters emphasizes Dean's self-sacrificing nature, even after death. Although he is still dead in this alternate universe, Dean's actions demonstrate his willingness to protect his loved ones, providing closure and saving his family. In the end, The Winchesters offers Dean the opportunity to save his family and gives fans a more satisfactory ending for his character.