The Vampire Diaries 6×21 “I’ll Wed You in the Golden Summertime” – It’s Alaric (Matt Davis) and Jo’s (guest star Jodi Lyn O’Keefe) wedding day and Elena (Nina Dobrev) and Bonnie (Kat Graham) do their best to help a stressed out Jo with the last minute preparations. After uncovering some life-changing news that Damon (Ian Somerhalder) has been keeping from him, Stefan (Paul Wesley) takes his brother on a road trip to give him some perspective on his future with Elena. Elsewhere, when Caroline (Candice Accola) returns to Mystic Falls after dealing with the fallout of her humanity-free rampage, she begins making amends with her friends and comes to a realization about her and Stefan’s prospects of being together. Finally, when Bonnie begins having vivid nightmares that Lily (guest star Annie Wersching) is coming after her, she enlists Matt’s (Zach Roerig) help in taking Lily down. Michael Trevino and Michael Malarkey also star. Michael Allowitz directed the episode written by Brian Young (#621). Original airdate 5/7/2015.