Jason O'Mara portrayed Jeffrey Mace in the Agents of S.H.I.E.L.D. episodes Meet the New Boss, Uprising, Lockup, The Good Samaritan, Deals With Our Devils, The Laws of Inferno Dynamics, Broken Promises, The Patriot, Wake Up, BOOM, The Man Behind the Shield, Self Control, Identity and Change and No Regrets. He also portrayed Mace's Life-Model Decoy in The Man Behind the Shield and Self Control.
- Jason O'Mara is one of the actors to portray characters for both Marvel Television and DC Entertainment. He voiced Bruce Wayne/Batman in the DC Animated Movie Universe.