The actor told Vulture that his character Antoine is "trying to stretch out" in the HBO drama's new run.
"He's trying to... be an entrepeneur, become a band leader, and he's trying to do something with his family and improve their lot in life," he explained. "He also tries to get his girl Desiree back to New Orleans."
He added that the show's characters will deal with the long-term consequences of Hurricane Katrina in the new episodes.
"There's the realisation that we are in it for the long haul," he said. "The immediacy of the disaster has moved on. The attention of the media has moved on. And you are left with the one place, your city, your home... devastated."
Pierce also admitted that the isolated nature of filming Treme can prove "frustrating".
"That's been depressing," he confessed. "I'm such a big fan of all the other actors in the show and... it's one of those things where you can't wait for the day to do something together. It whets the appetite."
Treme returns to HBO on April 24.
> Jon Seda teases Treme role
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