Klaus turns to Davina for help to learn more about a mysterious affliction affecting Hope. On their wedding day, Freya and Keelin make a tough decision about their future together, while Elijah is forced to confront a past memory of Hayley. Finally, Declan's growing curiosity in the city's supernatural secrets forces Marcel to step in.

Cast: Joseph Morgan, Daniel Gillies, Phoebe Tonkin, Charles Michael Davis, Yusuf Gatewood, Riley Voelkel, Danielle Rose Russell, Steven Krueger, Claire Holt, Danielle Campbell, Nathaniel Buzolic, Torrance Coombs, Kenneth Holley, Sharonne Lanier, Brooklyn Marshall