"Chuck Versus the Cat Squad" is the fifteenth episode of the fourth season of Chuck. It originally aired on February 14, 2011. As a surprise, Chuck Bartowski reunites Sarah Walker with her old spy team, the eponymous "C.A.T. Squad", which includes Carina Miller (Mini Anden). The squad flies to Rio de Janeiro to face off against their nemesis Augusto Gaez (Lou Diamond Phillips), but old grudges start to get in the way of the mission.