Armor offers little protection when the roof blows off the new Dominator.

The deadliest tornado of the season tears a 100-mile path across MS.

Reed pursues a TV weather reporter, and a longtime chaser calls it quits.

Tragedy strikes as Storm Chasers loses one of its own.

Sean's team struggles with a death, and Tim smokes out a monster.

South Dakota spins up the twister of the season.

Tim's team chases in the tornado twilight zone; Sean weathers controversy.

Storm and chasers collide in Minnesota for a final showdown.

The chase teams are on the front lines during an epic tornado outbreak.

The teams follow a storm headed toward downtown St. Louis.

Reed takes his team on a dangerous nighttime chase.

The teams help with the recovery effort in Alabama and Mississippi.

Reed and his team take the day off, but it backfires.

A tornado outbreak threatens to wreak havoc in Reed's backyard.

Sean tries his team's patience, and Tim makes questionable decisions.

The chase teams have one last chance to achieve their goals for the season.