Attack on Glenn Talbot

"Now do you see what I am, what I've become? I'm a superhero, and I plan on doing what needs to be done." "You're not a hero!"

- Glenn Talbot and George Talbot

The Attack on Glenn Talbot was an attempt by S.H.I.E.L.D. to stop Glenn Talbot who had become insane following his infusion with Gravitonium.

Background
"Your dad's a superhero now, just like those Avengers. And guess what. I even have my own superpowers."

- Glenn Talbot to George Talbot

Following an assassination attempt which left him brain damaged, General Glenn Talbot was captured by Hale, the last leader of HYDRA, who took him far from his wife Carla and his son George and tortured him using the Faustus method. As a result, Talbot disclosed sensitive information about S.H.I.E.L.D.. Once he was released by S.H.I.E.L.D., Talbot attempted to make up for his mistakes by infusing himself with Gravitonium, which granted him gravity manipulation abilities he used to put an end to the Siege of the Lighthouse which had been initiated by the Remorath.

However, due to his mental instability and the consciousness of Ian Quinn and Franklin Hall stored in the Gravitonium, Talbot soon fell into megalomania. Convinced that he was a superhero and the only one capable of stopping Thanos, Talbot agreed with the Confederacy that he should find more Gravitonium to power himself up. This put him into conflict with his former friend Phil Coulson, who he had imprisoned. Talbot then murdered S.H.I.E.L.D. Agent Kim and left to pursue his quest. Before locating more Gravitonium, however, he decided to visit his family.

Aftermath
"You ever see me tearing the Earth apart, bringing something up from the ground? Good. Now tell me where."

- Glenn Talbot to Robin Hinton

Still convinced that he was a superhero who could be able to protect Earth from any threat if he managed to find more Gravitonium to absorb, Glenn Talbot located and kidnapped the young Inhuman Robin Hinton, along with her mother Polly. Talbot intended to use Robin's powers so he could access untapped deposits of Gravitonium. Forced to cooperate so that her mother would be safe, Robin directed Talbot to Chicago.

S.H.I.E.L.D. was soon confronted to a dilemma. As they knew that Talbot could only be stopped by being killed, Leo Fitz and Jemma Simmons suggested to combine a dose of Centipede Serum with Odium reclaimed from Qajax so they would have a deadly weapon to use against their new enemy. However, Daisy Johnson had initially brought back the Centipede Serum so it could be associated with her mother Jiaying's DNA in order to creat a cure for Phil Coulson. The S.H.I.E.L.D. team thus had an impossible choice to make: letting Coulson die and saving the world, or saving Coulson with the risk of triggering the Destruction of Earth.