Plot summary
S.H.I.E.L.D. searches for one of its assets, Dr. Franklin Hall, who was kidnapped by Ian Quinn, CEO of Quinn Worldwide, using a gravity-based device. Quinn wants to use Hall to take control of the planet's gravity by building a giant " gravitonium " generator. Heading to Malta with the team, Skye volunteers to infiltrate Quinn's mansion during a party so that Coulson and Ward can rescue Hall. Skye tricks Quinn into believing she is betraying S.H.I.E.L.D. for the Rising Tide. However, Coulson soon discovers that Hall perpetrated his own escape in order to find and destroy both the gravitonium and the generator.
Coulson warns him that doing so would end up killing millions. Their violent disagreement forces Coulson to send Hall into the generator, seemingly consuming him, but shutting the machine down at the same time. Coulson orders that the gravitonium be placed under high security off the books at S.H.I.E.L.D.; however, no one notices that Hall is still somehow alive within the gravitonium.
Credits
Adapted from Wikipedia contributors, Agents of S.H.I.E.L.D. season 1. HTML formatting and reference markers removed.