Season 4 - Episode Guide

Reed and Joel bury the hatchet to face a new tornado season, but armor offers little protection when the roof blows off the new Dominator. Sean mixes up his crew and unleashes tension in the path of a West Texas twister. Team Dominator is the only team to drive all the way to Mississippi for tornadoes.
 

Reed, Joel and Chris are the first to arrive on the scene in Yazoo City, Mississippi, where a tornado has cut a path of destruction through the town. They temporarily give up the chase to aid the injured and search for survivors under the debris, risking their own lives to rescue those trapped.
 

As the storm chasers pursue the tornado outbreak of April 30 – May 2, 2010, dissent grows amongst Sean's crew as TIV2 continues to miss intercepts, and Byron Turk quits the team. Reed brings in his girlfriend, television meteorologist Ginger Zee, temporarily booting Chris out of his seat in the Dominator.
 

Dr. Josh Wurman of the VORTEX2 project is no longer allowed to provide guidance to the TIV2 team, leading Sean Casey to hand over more navigation control to his meteorologists. Under Matt Hughes' guidance, TIV2 intercepts one of its best tornadoes ever. This is the last episode to feature TIV2 navigator Matt Hughes who died on May 26, 2010 of an "injury unrelated to storm chasing". The episode is dedicated to him.
 

Sean, Reed, Tim, and the rest of the team must deal with the death of their team member, Matt Hughes. While they are grieving they must pick up the pieces, and finish the rest of the storm chasing season without Matt. Then, Sean fears for the future of his film after a chaser uploads a video showing TIV2 recklessly passing a string of slow-moving cars during a tornado, which could jeopardize funding from the VORTEX2 program. Reed grows restless as he misses a chase while the Dominator is fitted with probe cannons, and the TWISTEX team has a successful probe intercept.
 

When a massive storm cell threatens to strike South Dakota, the storm chasing teams travel the state's highways in hopes of witnessing powerful tornadoes, and their wish is granted when the storm spawns a series of twisters. Sean is devastated when Dr. Wurman recommends that TIV2 be sent home. Meanwhile, all three teams of storm chasers surround the slow moving EF4 Bowdle tornado as it demolishes farms and transmission towers.
 

Reed is so excited to use his new probe cannon that he has trouble perfecting his aim when he's confronted with a series of tornadoes. While he does succeed in getting a probe into a tornado, the tornado carries the probe too far and the team is unable to retrieve it. While Tim is away, the TWISTEX team weathers some strange atmospheric occurrences in South Dakota and gets pinned between two violent twisters but get out safely. Sean and Josh Wurman agree that TIV2 may continue operating, but only if it maintains a 75-mile distance from VORTEX2, which leads to frustration when both teams target the same storms with VORTEX2 actually switching storms to Sean's after taking one storm, forcing Sean's team to back off when they had a good chance at an intercept.
 

Storm and chasers collide in Minnesota for a final showdown. Sean's team gets a break as VORTEX2 calls off all operations for the day leading to no conflict between the teams. TIV2 breaks down early on, but luckily the garage they stop at has the part they need and it is repaired quickly. As a ferocious EF-4 twister targets the town of Wadena, Minnesota, one team finds themselves in the wrong place at the right time, and Sean's trial by fire becomes a race to save others. Dominator succeeds in intercepting the tornado and gets probes into it, but TIV2 fails to intercept while TWISTEX is too far away. Wadena is demolished and Sean's team is in the middle of town as it happens and in the aftermath both Sean's team and Tim's do their best to save lives.
 

This special features interviews and documentary footage with the show's production crew, explaining how they accompany the storm chasing teams and the difficulties they encounter working under intense conditions.It shows the main camera angles too.