Henry Oswald Simmons Jr. portrayed Alphonso Mackenzie in Agents of S.H.I.E.L.D. and in Agents of S.H.I.E.L.D.: Slingshot episode Progress. He also portrayed Mackenzie's Life-Model Decoy in The Man Behind the Shield and Self Control.

He was a recurring guest star in Season Two and in Season Three, Simmons was upgraded to a starring cast member.

He portrayed himself in Agents of S.H.I.E.L.D.: Academy.


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