Agents of Shield "Broken Promises/The Patriot"

Season 4 Episode 9 "Broken Promises":
Though Coulson and May are growing closer, Coulson remains unaware of the dark secret May is hiding beneath the surface. Meanwhile, Aida is unrelenting in her search for the Darkhold.

Season 4 Episode 10 "The Patriot":
Separated from their team, Coulson and Mack discover a shocking secret about Mace, leaving all of S.H.I.E.L.D. in a precarious position.