Tornado season erupts early in Oklahoma. Reed gets his new Dominator too close. Tim chases multiples, and Sean battles a rain-wrapped monster.

Sean and Reed face off at the New Mexico border. Monster tornados break up everything in their paths, except the tension.

Reed steps up his science to take on Dr. Josh Wurman's massive research project. Joel has second thoughts. The fallout reaches Sean, who makes a drastic decision.

Reed's new radar propels him from aggressive chaser to extreme scientist, inside an EF3.

Reed, Sean and Tim take on the strongest tornado conditions of the season, and nature responds with twisters too close to home.

Sean Casey's meteorologists finally put him in position for the shot of a lifetime, and this time it's a home run. Reed, Tim, and Josh all score big.

On the last chase of the season in Nebraska, Reed and Tim chase multiple vortices. But when an EF-3 monster touches down right on top of Reed's armored research vehicle, Mother Nature shows who really dominates in Tornado Alley.

Extreme chasers Reed Timmer, Joel Taylor, IMAX Filmmaker Sean Casey, and Tim Samaras present their most exciting tornado chasing moments.