NASHVILLE -- Tornadoes, fires and explosive family drama.

"9-1-1: Nashville" is the latest in Ryan Murphy's franchise about heroic emergency responders.

We headed down to Nashville to meet the star-studded cast of the show, which includes everyone from Hollywood veterans to country music superstars to TV newcomers.

They told me: hold tight to that cowboy hat, because things are about to get fiery in Music City.

"Anything is possible and you should expect the unexpected," says actor Chris O'Donnell.

From film to TV to the stage, O'Donnell's career spans near four decades. Now, he's Captain Don Hart in "9-1-1 Nashville."

"There's the excitement, the action, the fire team," O'Donnell says. "Anything can happen."

Michael Provost plays his son, Lieutenant Ryan Hart. Together they run Na

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