The fourth season of Storm Chasers premiered Wednesday, October 13, 2010, at 10 pm Eastern and documents teams of storm chasers during the spring and summer of 2010. This season continues to feature the three groups from the previous season: The TVN team is led by Reed Timmer and rejoined by driver Joel Taylor, who had temporarily left the team the previous year. IMAX filmmaker Sean Casey returns seeking better tornado footage, this time employing a second-unit IMAX crew to film TIV2 itself. The TWISTEX team led by veteran storm chaser Tim Samaras also returns with a new "TWISTEX Probe" vehicle (a 2008 GMC Sierra HD with extensive weather instrumentation).[1] One of the major events early in the season is the TVN crew's encounter with the aftermath of the April 2010 tornado outbreak in Yazoo City, Mississippi. This was the last season to feature TIV2 Navigator Matt Hughes who died May 26, 2010. Matt's last chase is in the show "Dedication" which is dedicated to Matt Hughes. Dr. Josh Wurman and his DOW team continues working as part of the massive, 2 year government-funded VORTEX2.