Sezon 4
Bölümler
1 Glacier Meltdown 31 Oca 2007 
2 Destructive Forces 21 Şub 2007 
3 Stone Age Apocalypse 28 Şub 2007 
4 Comets 7 Mar 2007 
5 Prehistoric Americans 14 Mar 2007 
6 Deep Space Probes 27 Mar 2007 
7 Dino Meteor 12 Nis 2007 8 Planet Storm 26 Nis 2007 
9 Polar Apocalypse 1 Nis 2007 
10 Killer Lakes 3 May 2007 
11 Ring of Fire 2 Ağu 2007 
12 Alien Safari 9 Ağu 2007 
13 Hyper Hurricanes 18 Eki 2007 
14 Dangers of the Deep 25 Eki 2007 
15 Solar Force 30 Eki 2007 
16 Birth of the Solar System 6 Kas 2007 
17 Hubble Trouble 6 Kas 2007