The Avengers: Earth's Mightiest Heroes (2010)

S2E20 Code Red

A dangerous virus unexpectedly breaks out near the Avengers' headquarters, prompting the Secretary of Defense to hold the team responsible. In response, he orders a lockdown of the mansion and surrounds it with military forces, escalating the tension between the Avengers and the government. As the team scrambles to clear their name and find a solution to the outbreak, they must confront both the external threat and the growing distrust from those they once relied upon for support.