A Streetcar Named Desire

The unexpected arrival of Stefan Salvatore in New Orleans, who is on the run from the vampire hunter Rayna, may be the key to helping Freya rescue Klaus and Elijah from a magical trap they are put under. Stefan and Hayley must join forces to rescue Klaus and Elijah from the Strix. Aya tasks Davina with performing a ritual to break the sirelines. The ritual goes awry, and only Klaus' line is broken, leaving Klaus feeling weakened. Klaus buries Aurora for all eternity. Hayley kills Aya, avenging Jackson's death. Davina, having broken Klaus' line, gathers his blood from the ritual, the ash of the dead, and brings Kol back to life.

This episode concludes a crossover with The Vampire Diaries that begins on "Moonlight on the Bayou".

Plot summary from Wikipedia (CC BY-SA 4.0). Source