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.

The MythBusters put an exploding airbag to the ultimate test.

The MythBusters investigate if a burglar can be shot out of a chimney.

The team examines if a water-heater can turn into a destructive torpedo.

The MythBusters test if aggressive music leads to more aggressive driving.

The MythBusters take on Hollywood's greatest invisible assassins.