As the war among the sire lines continues to grow, Klaus receives an unexpected visit by a figure from his past. When Elijah suspects that Tristan is hiding something, he enlists Marcel's help to find out what he's up to. Elsewhere, Davina struggles with her role as Regent and seeks advice from Hayley. Finally, an ancient secret that is uncovered threatens to tear the Mikaelson brothers apart for good.
Elenco: Joseph Morgan , Daniel Gillies , Phoebe Tonkin , Charles Michael Davis , Riley Voelkel , Yusuf Gatewood , Steven Krueger , Danielle Rose Russell , Claudia Black , Daniella Pineda , Danielle Campbell , Leah Pipes , Phoebe Tonkin .