11/15/2013 02:59 pm ET

Michelle Trachtenberg Heads To 'NCIS: LA' For Action-Packed Holiday Episode

Imeh Akpanudosen via Getty Images

Michelle Trachtenberg is visiting the gang at "NCIS: LA."

EW has learned that the "Gossip Girl" alum, who recently appeared in "Killing Kennedy," will guest star in an action-packed holiday episode set to air Dec. 17 on CBS.

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