welp if my math is right 855mins total run time divided by 45mins per episode should equal exactly 19 episodes. The problem is the only info on the box says I Shouldnt Be Alive and then under the title it says The Series. After looking at discovery channels website they list 18 episodes of Shouldnt be Alive so my guess is it's all of them plus and extra show or something. They also have the science of survival set on sale on discoverys shop so I might pick that up.