[s2e10] The - Last Light

: It is heavily implied that French scientists (the "Primrose team") were responsible for starting the outbreak.

: Get married and stay with the research group. [S2E10] The Last Light

: Successfully joins the CRM as a soldier with the secret intent of taking them down from the inside. The Post-Credits Stinger : It is heavily implied that French scientists

: Felix kills Frank Newton in a brutal fight, while Huck stays behind to destroy the CRM's stockpile of chlorine gas. [S2E10] The Last Light

: Remain behind with the other scientists to continue research on a cure/biological weapon against walkers.

The episode follows the "Endlings" and their allies in a final showdown against the to prevent a mass genocide in Portland.