All-New 'Vampire Diaries' Tonight - See Pics & Clip!

Nina Dobrev is restrained against her will in this new still from The Vampire Diaries.

In tonight’s episode “The Cell,” Stefan (Paul Wesley) continues to offer Katherine (Dobrev) his support while trying to mask his own pain, until Caroline (Candice Accola) shows up with an unusual form of therapy.

After trying to make amends with Caroline, Elena (also Dobrev) grows so concerned about Damon (Ian Somerhalder) that she turns to Aaron (Shaun Sipos) 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.

“The Cell” airs Thursday, December 5th @ 8PM ET/PT on the CW.