Ernie Hudson has spent decades chasing ghosts, solving crimes and embodying characters with grit and heart.

Now, at 80, the Boston Blue star is proving that discipline and preparation are what keep him ready for anything.

In the April 3 episode, Hudson’s Reverend Edwin Peters delivers a punch that diffuses a tense situation inside his own church.

Producers initially brought in a stuntman, but Hudson waved him off.

“Really, guys? I mean, I think I can throw a punch,” he recalled.

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For Hudson, the moment wasn’t about proving toughness, it was about showing the payoff of staying prepared for years.

“I turned 80, but something about that number, it’s big. And it’s even big for me. Sometimes people assume that maybe you can’t do something, but I’ve always tried to stay ready, so to speak,” he told PEOPLE.

That readiness came from years of maintaining his weight and fitness, never letting himself slip to a point where he couldn’t rise to a role’s demands.

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Hudson explained that he treats his body as his “instrument,” keeping himself in shape not through dramatic gym sessions but by maintaining balance throughout the day.

He’s avoided the cycle of gaining and losing weight, instead staying consistent so he’s never caught off guard when a role calls for more than dialogue.

He didn’t want Reverend Peters to be confined to the dinner table, offering wisdom but little action.

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Instead, he embraced the chance to show that even at 80, he can deliver both physically and emotionally.

As Boston Blue continues, Hudson hopes his character’s story will shine a spotlight on the community Peters ‘serves’ and ‘protects’.

Whether or not more punches are thrown, Hudson’s discipline ensures he’ll be ready when the moment comes.

Boston Blue airs Fridays at 10 p.m. ET on CBS.