Mystery of Dead Mountain

An IMAX filmmaker and an atmospheric scientist try to intercept tornadoes.

A chase is cut short when the storm moves into an area without paved roads.

Sean begins to trust his instincts over Josh's science.

Tornado season winds down, and Sean seeks a shot from inside a vortex.

Storm season starts out deadly, and Josh and Sean race to get a bigger, badder Tornado Intercept Vehicle, TIV-2, on the road. Meanwhile, a new force of nature emerges in Tornado Alley as Reed Timmer beats the pros to get tornado intercepts.

Sean's new TIV-2 loses parts, and Reed's team pursues a storm in Texas.

Tensions mount between Sean and Josh, and Reed chases a nighttime tornado.

A monster EF-4 tornado chases the storm chasers through eastern Arkansas.

Josh tries to fix broken radar, and a team tries to escape a ditch.

The storm chasers mobilize as tornadoes form all over western Kansas.

The teams struggle to find the perfect storm in Nebraska.

Reed pushes his team closer to a twister than ever before.

Tornado season erupts early in OK, and Reed's new Dominator gets too close.

A huge wedge impacts in the Texas Panhandle, and the unbelievable happens.

Reed steps up his science game to take on Josh Wurman's research project.

Reed's new radar propels him from aggressive chaser to extreme scientist.