Season 4 Summary[]
Season 4 Episodes[]
| No. Overall | No. in Season | Title | Original Air Date |
|---|---|---|---|
| 32 | 1 | The Mayan Conspiracy | February 17, 2012 |
| 33 | 2 | The Doomsday Prophecies | February 17, 2012 |
| 34 | 3 | The Greys | February 24, 2012 |
| 35 | 4 | Aliens and Mega-Disasters | March 2, 2012 |
| 36 | 5 | The NASA Connection | March 9, 2012 |
| 37 | 6 | The Mystery of Puma Punku | March 16, 2012 |
| 38 | 7 | Aliens and Bigfoot | March 23, 2012 |
| 39 | 8 | The Da Vinci Conspiracy | April 6, 2012 |
| 40 | 9 | The Time Travelers | April 27, 2012 |
| 41 | 10 | Aliens and Dinosaurs | May 4, 2012 |