The Vampire Diaries Joseph Morgan spoiled that tonight’s episode, “The Five”, is one of his favorite episodes this season. Morgan also reveals that we will learn a huge secret that fits into the mythology of Mystic Falls and the Originals’ history.
“It’s really a big reveal and will play a dominant part in how the season evolves.” Executive producer Julie Plec also tells us, “The question of what is different about [Connor], why is he able to deeply, darkly hunt and kill vampires, what drives him, what his history is and what other people know about his history start to unfold … in that flashback.”
Source: TV Guide