When you watch Marvel's Agents of S.H.I.E.L.D. Season 5 Episode 19, the team is fracturing due to disagreements over whether or not it was the right decision for Yo-Yo to kill Ruby. Mack is especially concerned, since he and Yo-Yo had promised each other not to lose each other due to their experiences in the future, yet he thinks that's exactly what's happening, with Yo-Yo willing to go to any lengths to prevent or otherwise avert that future from coming to pass. Meanwhile, Fitz, Simmons, and Deke ponder Deke's metaphysical existence, given that he's their grandson. If they avert the end of the world, would Deke simply cease to exist? Yet these and other problems seem minor when Talbot manages to gather his shattered thoughts together enough to realize that while under Hydra's compulsions he transmitted the coordinates of the Lighthouse to Hale's alien benefactors. Sure enough, the agents of S.H.I.E.L.D. face an invasion by vastly more powerful aliens who will stop at nothing to get their hands on the gravitonium they have in their possession. Find out what happens when you watch Marvel's Agents of S.H.I.E.L.D. Season 5 Episode 19 online!