90% Agents of S.H.I.E.L.D. 6.12: “The Sign” Review Brent Botsford September 29, 2019 Entertainment, Reviews, Television NOTE: Full spoilers for this episode of, "Agents of S.H.I.E.L.D." are present in this review With Mack and Yo-Yo being held captive by Izel, and the monolith energies having been used to ...