Lauren Cohan teases 'Chuck' arc

Lauren Cohan has dropped more hints about her guest role on NBC's Chuck.

The Vampire Diaries star will debut in tonight's episode as mysterious socialite Vivian McArthur, rumoured to be the daughter of the villainous Volkoff (Timothy Dalton).

"We don't know her exact connection to the Volkoff empire," Cohan told TV Line. "Chuck and Sarah come to find her... because they suspect her of being linked with Volkoff's corporation. But then they find out she's actually in need of their protection.

"She's kind of a well-educated, bumbling recluse. She's very suspicious of [Chuck and Sarah] and what they want out of her, but then she joins forces with them."

Cohan also claimed that revelations surrounding her character will "discount things that have already been revealed on Chuck".

Discussing her future on the series, she added: "I know I'm on for about five episodes. I'm off for a couple right now, and then I come back. I've heard rumours of some really cool revelations... but again, they're not concrete rumours."

Chuck continues tonight at 8/7c on NBC.

> Lauren Cohan teases Chuck role