Know Thy Enemy

"**Know Thy Enemy**"
"Know Thy Enemy"
The Vampire Diaries episode
Episode no.	Season 2; Episode 17
Directed by	Wendey Stanzler
Written by	Mike Daniels
Production code	2J5267
Original air date	April 7, 2011
Guest appearances
	Mia Kirshner (Isobel); David Anders (John Gilbert); Marguerite MacIntyre (Elizabeth Forbes); Bryton James (Luka Martin); Gino Anthony Pesi (Maddox);
Episode chronology
← Previous; "The House Guest"	Next →; "The Last Dance"
	The Vampire Diaries season 2
	List of episodes

"Know Thy Enemy" is the 17th episode of the second season of The CW television series, The Vampire Diaries and the 39th episode of the series overall. It originally aired on April 7, 2011. The episode was written by Mike Daniels and directed by Wendey Stanzler.