Agent Sitwell: Jasper Sitwell is a high ranking S.H.I.E.L.D. agent who oversees sensitive operations around the world. When one goes awry, Captain America and Black Widow are sent in.

Batroc: A mercenary for hire, Georges Batroc comes into conflict with Captain America when his band of soldiers hijacks a S.H.I.E.L.D. vessel and takes the crew hostage.