Real Name: Gerald Simms

Identity/Class: Human cyborg

Occupation: Agent of S.H.I.E.L.D.

Group Membership: Elite Agents of S.H.I.E.L.D. (Kid, M-80, Nails, Skul)

Affiliations: Sharon Carter, Dum Dum Dugan

Enemies: Amazon (Katrina Louis van Horn), HAMMER, Hydra, Thunderbolts, Skein (Sybil Dvorak)

Known Relatives: None

Aliases: None

Base of Operations: Mobile

First Appearance: Captain America Annual 2000/2 (2000)

Powers/Abilities: Simms's arms cybernetic and have many technological capabilities including a liquid metal mesh that he can reshape them at will. The arms also allow Simms to hook up to computer systems and operate them. Also contained in the arms are a pair of miniature rocket launchers.

History: (Captain America Annual 2000/2 (fb) - BTS) - As a child, Gerald lost both his arms. Because of this he grew to embrace technology.

(Captain America Annual 2000/2) - On the first mission of the Elite Agents of S.H.I.E.L.D. Silicon remained in contact with Director Sharon Carter. The mission, to retrieve a stolen S.H.I.E.L.D. hovercar at a black-market bazaar in the Gobi Desert was complicated when Hydra agents activated the car's self destruct mechanism. Before it could explode the Silicon was able to interface with the car and shut down the self destruct. The car was successfully returned to Sharon Carter.

(Thunderbolts I#69) - Silicon and the others were led by Dum-Dum Dugan to retrieve Blackheath from the Thunderbolts.

(Thunderbolts I#71) - When the Thunderbolts tried to escape, the Elite Agents pursued. Silicon caught up with Skein and pitted his liquid metal mesh against her texile telekinesis. As the two drew closer, Skein began to make out with Silicon. Amazon then approached and knocked him out.

(Secret Warriors#1) - Simms was listed as Rogue Security at the HAMMER occupied Torch station in SHIELD's agent files.

Comments: Created by Bill Rosemann, Scot Eaton and Bud LaRosa

by Patrick D Ryall

Silicon should not be confused with:

Images taken from:

Captain Aemrica Annual 2000, page 46, panel 3

Captain America Annual 2000 (2000) - Bill Rosemann (writer), Scott Eaton (pencils), Bud LaRosa (inks), Bobbie Chase (editor)
Thunderbolts I#69 (October, 2002) - Fabian Nicieza (writer), Jean Jacques Dzialowski (penciler), Al Vey (inker), Tom Brevoort (editor)
Thunderbolts I#71 (November, 2002) - Fabian Nicieza (writer), Manuel Garcia (penciler), Al Vey (inker), Tom Brevoort (editor)
Secret Warriors#1/2 (April, 2009) - Brian Michael Bendis & Jonathan Hickman (writers), Tom Brevoort (editor)

Last updated: 03/22/13

Any Additions/Corrections? please let me know.

Non-Marvel Copyright info
All other characters mentioned or pictured are ™  and © 1941-2099 Marvel Characters, Inc. All Rights Reserved. If you like this stuff, you should check out the real thing!
Please visit The Marvel Official Site at:

Special Thanks to for hosting the Appendix, Master List, etc.!

Back to Characters