The Outbreak

 is the fifteenth episode in Season 4 and 81st overall.

Synopsis
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Main Characters

 * as Elena Gilbert
 * as Stefan Salvatore
 * as Damon Salvatore
 * as Caroline Forbes
 * as Bonnie Bennett
 * as Matt Donovan (credit only)
 * as Niklaus Mikaelson
 * as Meredith Fell
 * as June Flemming

Recurring Characters

 * as Antonio Wilder
 * __________ as Ivan Wilson
 * as Gary
 * as Stephan
 * as Christian Fell
 * as Natalie
 * as Ashley
 * as Brigitte
 * __________ as Nick
 * __________ as Arnold
 * as David
 * as Amy
 * __________ as Peter
 * as Jessica

Trivia & Notes

 * The kitsune are seen for the first time.
 * Bonnie's eyes became full black because of dark magic like it did before in The Undead.
 * Greatest death toll occurred in this episode.