Sneak Peek footage, images and synopsis from "The Vampire Diaries" episode "The Cell", airing December 5, 2013:
"...'Stefan' continues to offer 'Katherine' his support while trying to mask his own pain, until 'Caroline' shows up with an unusual form of therapy. Then after trying to make amends with Caroline, 'Elena' grows so concerned about 'Damon' that she turns to 'Aaron' for help.
"Later, when Damon tells Elena about a terrible ordeal in his past that he has kept secret for decades, she shares the disturbing information she just learned about her own family. Finally, Aaron decides on a desperate course of action after a conversation with 'Dr. Wes'..."
Click the images to enlarge and Sneak Peek "The Vampire Diaries: The Cell"...