Martin Henderson Would Return To ‘Grey’s Anatomy’ If There Is “Really Clear Plan” For Nathan

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• Henderson left 'Grey's Anatomy' over 7 years ago, making him one of the few major cast members who hasn't returned to the show yet.
• The actor says he'd only consider a comeback if there's a 'really clear plan' for his character Nathan, signaling the producers would need to craft a compelling storyline to lure him back.