S4, E4: Damon goes with Elena and Bonnie to visit Whitmore College, where Professor Shane (recurring guest star David Alpay – The Borgias) is taking over the Occult Studies classes formerly taught by Bonnie’s grandmother. At a fraternity costume party, Damon takes advantage of the wild scene to give Elena a lesson in choosing a victim. Rebekah’s (recurring guest star Claire Holt) attempt to buy Matt’s forgiveness falls flat, but she is intrigued by unexpected news from Klaus. When Stefan questions Klaus about Connor’s (recurring guest star Todd Williams) motives, Klaus reveals a long-ago encounter with a powerful group of vampire hunters — flashing back to 12th century Italy — but it is Rebekah who delivers the information that stuns Stefan.