The CW has released an official synopsis and a clip of the fourth episode of The Vampire Diaries.
 
"Family Ties": Elena (Nina Dobrev) asks Stefan (Paul Wesley) to escort her to the towns annual Founders Party. Vicki (Kayla Ewell) gets Tyler (Michael Trevino) to ask her to the party, then accuses him of trying to hide their relationship from his family. Zach (guest star Chris William Martin) reveals a useful family secret to Stefan. At the party, Damon (Ian Somerhalder) tells Elena a story about the Salvatore familys past, leaving Elena with questions that Stefan refuses to answer. Finally, Stefan takes action to get Damon out of his life for good.

Steven R. McQueen, Sara Canning, Katerina Graham, Candice Accola and Zach Roerig also star. Guy Ferland directed the episode written by Andrew Kreisberg & Brian Young.

"The Vampire Diaries" airs Thursdays from 8-9 p.m. ET on The CW.