3x15: "An Old Friend Calls"

Description: THE ARRIVAL OF A NEW FOE — When Klaus (Joseph Morgan) learns that Cortez (guest star Matt Cedeno), an old vampire with a vendetta against him, has arrived in New Orleans, he finds himself forced to deal with this new threat. Meanwhile, when Cortez begins threatening the lives of innocent residents, Vincent (Yusuf Gatewood) has no choice but to help the vengeful vampire in his plan to take down Klaus. Elsewhere, Marcel (Charles Michael Davis) turns to Davina (Danielle Campbell) for her help after several Strix members turn up missing, and Elijah (Daniel Gillies) confronts Hayley (Phoebe Tonkin) after learning that she’s been dealing with Jackson’s death in a destructive way. Leah Pipes also stars. Jeffrey Hunt directed the episode written by Carina Adly Mackenzie & Michael Russo