Simmons (Elizabeth Henstridge) and Coulson (Clark Gregg) interrogate scientists at Area 51 in the year 1955, looking for chronicoms who have infiltrated the base, with Simmons posing as Agent Peggy Carter. But they hit a snag when Agent Sousa (guest star Enver Gjokaj) -- Peggy Carter's partner -- shows up. From 'Alien Commies from the Future!,' season 7, episode 3 of Marvel's Agents of S.H.I.E.L.D. Watch Marvel's Agents of S.H.I.E.L.D. WEDNESDAY 10|9c on ABC, streaming, on demand, and Hulu.