This would be the episode before the show ends the series with the second season finale on January 22.
With two episodes left, "Dollhouse" will deliver the answers that fans of the show have been waiting for on January 15. In "The Hollow Men", sacrifices are made when Echo leads her crew to Arizona to dismantle the Rossum Corporation's mainframe.
Among the highlights in the preview are a one-on-one confrontation between Echo and Dr. Claire Sanders, Topher being 'chosen' by Boyd, and Paul telling Echo that he is glad they are together. Above all of that, explosions occur in the lab and Boyd tells Echo that she is the 'key'.
"Dollhouse", surviving only two seasons, will wrap it all up in the 13th episode called "Epitaph Two: Return". Picking up from the events depicted in "Epitaph 1," the "lost" episode is set in the year 2020. Echo and her surviving Dollhouse crew attempt to restore order to a devastating future world before mankind is eliminated.