William "Bill" Paxton (May 17, 1955 - February 25, 2017) portrayed John Garrett in the Agents of S.H.I.E.L.D. episodes T.A.H.I.T.I., End of the Beginning, Turn, Turn, Turn, Providence, Ragtag, Beginning of the End and in a flashback from The Only Light in the Darkness.
He was honored in an epitaph at the end of the episode What If..., the first episode to air after his death from complications following heart surgery. An image of John Garrett in the Framework was used in All the Madame's Men.
- Bill Paxton has also appeared in the comic book adaptations 2 Guns and Edge of Tomorrow.
- Bill Paxton's father John Lane Paxton played the Osborn's butler in the Spider-Man trilogy of movies by Sam Raimi.