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"Disturbing Behavior" is the fourth episode of the third season of The CW television series, The Vampire Diaries and the 48th episode of the series overall. It originally aired on October 6, 2011. The episode was written by Brian Young and directed by Wendey Stanzler.
Original Release
10/10/2012
Cast
| Name | Character |
|---|
| Nina Dobrev | Elena Gilbert / Katherine Pierce |
| Paul Wesley | Stefan Salvatore |
| Ian Somerhalder | Damon Salvatore |
| Steven R. McQueen | Jeremy Gilbert |
| Kat Graham | Bonnie Bennett |
| Zach Roerig | Matt Donovan |
| Candice King | Caroline Forbes |
| Michael Trevino | Tyler Lockwood |
| Matthew Davis | Alaric Saltzman |
| Joseph Morgan | Klaus Mikaelson |
Directors
Writers
L.J. Smith, Julie Plec, Kevin Williamson, Brian Young
Cast
| Name | Character |
|---|
| Nina Dobrev | Elena Gilbert / Katherine Pierce |
| Paul Wesley | Stefan Salvatore |
| Ian Somerhalder | Damon Salvatore |
| Steven R. McQueen | Jeremy Gilbert |
| Kat Graham | Bonnie Bennett |
| Zach Roerig | Matt Donovan |
| Candice King | Caroline Forbes |
| Michael Trevino | Tyler Lockwood |
| Matthew Davis | Alaric Saltzman |
| Joseph Morgan | Klaus Mikaelson |
| Marguerite MacIntyre | Sheriff Liz Forbes |
| Claire Holt | Rebekah Mikaelson |
| Melise | Anna Zhu |
| Jack Coleman | Bill Forbes |
| Susan Walters | Carol Lockwood |
| Charmin Lee | Old Gloria |
| Tim Blanchard | Founders Council Member |
Producers
| Name | Role |
|---|
| Kevin Williamson | Executive Producer |
| Julie Plec | Executive Producer |
| Caroline Dries | Executive Producer |
| Bob Levy | Executive Producer |
| Turi Meyer | Executive Producer |
| Leslie Morgenstein | Executive Producer |
| Alfredo Septién | Executive Producer |
| John Behring | Producer |
| Michael Narducci | Producer |
| James L. Thompson III | Producer |
| Pascal Verschooris | Producer |
| Nick Wauters | Producer |
