UNDATED — Comic-Con fans screamed with delight at the extended reel about a guy, a girl, another guy, same girl…and a whole lot of blood, lust and supernatural shenanigans. Can’t wait for your Salvatore fix? Watch the Comic-Con trailer here. Season Five of “The Vampire Diaries” returns on October 3 — airing Thursdays at 8/7c on CW56.