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 and The Laws of Inferno Dynamics, Broken Promises, The Patriot, Wake Up, BOOM and The Man Behind the Shield. 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 Studios and DC Entertainment. He voiced Bruce Wayne/Batman in the DC Universe Animated Original Movies.