Ice Road Truckers Season 4 Episode 16 (Ice Road Truckers s04e16) with title “New King of the Dalton” aired on Sunday, October 3rd 2010 at 09:00 pm via History Network.
Here is summary for Ice Road Truckers Season 4 Episode 16 :

The fourth season ends and one person stands alone as the King of the Haul Road. Tempers flare between Ray and Greg on the Atigun; Lisa’s best season is threatened; and Alex races to beat the Polar Bear.