Sean's new TIV-2 chases a promising storm, but vehicle parts fly for all the wrong reasons. Reed's team pursues a monster storm as it bears down on the town of Lamesa Texas.

TIV-1 makes a heroic return, but the tables turn as a monster EF-4 tornado chases the storm chasers through eastern Arkansas.

The DOW Team's in chaos as a broken radar sends Josh scrambling to fix it. Reed jumps on the opportunity to scoop the science team once again, while Danny and Aaron struggle to escape a ditch before a tornado gets too close.

Reed and Josh's teams struggle to find the perfect storm in Nebraska. Reed's girlfriend Jene gets lost in a deadly hailstorm while the DOW team mistakenly drives into an on-coming tornado.

As tornado season comes to a close, Sean has one last chance to get the shot of all shots from inside a tornado, while Reed pushes his team to the edge, getting closer to a twister than ever before.