The Cocoon is a classified training facility used by S.H.I.E.L.D..
Joey Gutierrez was sent to the Cocoon to learn to control his powers under the supervision of Dr. Andrew Garner. After successfully molding a filing cabinet into a work of art, Gutierrez expressed interest in joining Daisy Johnson's Caterpillars.
However, they were interrupted by a pair of S.H.I.E.L.D. agents stormed into the room attempting to stop Melinda May, who demanded that they take Gutierrez back to the Playground and leave her alone with Garner. Once they were alone, May revealed that she knew Garner had been near all the Inhumans who had been killed by Lash and he had avoided having his blood taken. She then revealed that Werner von Strucker had survived and had told her how he had witnessed Garner transforming into Lash. Garner pretended to be confused during May's reveal of evidence. When she tried pressing the issue, Garner shot her with an I.C.E.R.
In chronological order:
- Agents of S.H.I.E.L.D.
- In the comics, The Cocoon was the original secret base for the Secret Warriors.