Chuck Versus the Tic Tac

"Chuck Versus the Tic Tac" is the tenth episode of the third season of the television series Chuck, airing on March 15, 2010. When Casey's former commanding officer returns, Chuck and Sarah take it upon themselves to clear his name when he is arrested for treason. Meanwhile, Devon and Ellie are at odds over their future when Ellie receives her dream fellowship. Plot summary Main Plot As the episode begins, Marine 2nd Lt. Alex Coburn is being reviewed by a ranking officer regarding his application to special forces training while in Honduras in 1989. His promotion is declined, however as he walks out of the command tent, he is stopped by Col. James Keller (Robert Patrick). Keller offers him a chance to live his dream on a top-secret NSA black ops team. Twenty-one years later, Casey is meeting the same Col. Keller, his former commanding officer, in his apartment. Keller advises him his team will be testing government security, and during the mission orders him to retrieve something from one of the secured vaults. Outside, Morgan is practicing his spy techniques when he is interrupted by Chuck. Chuck sees Keller leave, and finds Casey's behavior suspicious. Later at Castle, Beckman issues the team their orders to test the security at a secret government holding facility. Utilizing their skills and the Intersect, the team successfully reaches the vault. Chuck and Casey enter while Sarah stands guard outside, and while Chuck breaks into their target Casey slips away to open another, removing a nondescript pill and slipping it in his gear. Chuck sees this, and when confronted, Casey aims his gun at Chuck and threatens him if he says anything about it.