Season 4 aired between 17 Feb 2012 and 04 May 2012, 10 episodes.
Episodes
E01
The Mayan Conspiracy
17 Feb 2012
E02
The Doomsday Prophecies
17 Feb 2012
E03
The Greys
24 Feb 2012
E04
Aliens and Mega-Disasters
02 Mar 2012
E05
The NASA Connection
09 Mar 2012
E06
The Mystery of Puma Punku
16 Mar 2012
E07
Aliens and Bigfoot
23 Mar 2012
E08
The Da Vinci Conspiracy
06 Apr 2012
E09
The Time Travelers
27 Apr 2012
E10
Aliens and Dinosaurs
04 May 2012