He's had his shot at primetime twice before -- "Life On Mars" and "Terra Nova" -- and while those shows didn't make it out of their first year, O'Mara continues to get additional chances. And as Dennis Quaid's tough yet tender beefcake brother in "Vegas," it really does appear that the third time will be a complete charm for the actor and for audiences. "Vegas" Premieres Sept. 25 at 10/9c on CBS. Watch Previews, Set Your DVR and Add to Queue here.
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