Chasing the Devil's Tail

S2, E7: Discovering that Elijah has been afflicted by Esther's (recurring guest star Sonja Sohn) magic, Klaus heads to the bayou in search of an antidote, but quickly realizes he's not alone. Armed with intel gathered by Aiden (recurring guest star Colin Woodell – Devious Maids), Hayley teams up with Aiden, Marcel, Cami and Josh (recurring guest star Steven Krueger) and launches a plan to take down Vincent (recurring guest star Yusuf Gatewood) by exploiting his one weakness. Meanwhile, with Esther determined to carry out her plan, Vincent and Kaleb (recurring guest star Daniel Sharman) are forced to reconsider their own strategies. Intrigued by Davina's unwavering attempts to create an unlinking spell, Kaleb lets her in on some secrets from his past and brings her to a place he frequented in 1914.