Season 1 (6 episodes)
- 0. Episode 0 Pilot
- 1. Episode 1 The Evidence
- 2. Episode 2 The Visitors
- 3. Episode 3 The Mission
- 4. Episode 4 Closer Encounters
- 5. Episode 5 The Return
Season 2 (11 episodes)
- 1. Episode 1 Mysterious Places
- 2. Episode 2 Gods & Aliens
- 3. Episode 3 Secret Cover-Ups
- 4. Episode 4
- 5. Episode 5
- 6. Episode 6 Alien Tech
- 7. Episode 7 Angels and Aliens
- 8. Episode 8 Unexplained Structures
- 9. Episode 9 Alien Devastations
- 10. Episode 10 Alien Messengers
- 11. Episode 11 Aliens and the Old West
Season 3 (9 episodes)
- 2. Episode 2 Aliens and Monsters
- 3. Episode 3 Aliens and Sacred Places
- 4. Episode 4 Aliens and the Temples of Gold
- 5. Episode 5 Aliens and Mysterious Rituals
- 6. Episode 6 Aliens and Ancient Engineers
- 7. Episode 7 Aliens, Plagues and Epidemics
- 8. Episode 8 Aliens and Lost Worlds
- 9. Episode 9 Aliens and Deadly Weapons
- 10. Episode 10 Aliens and Evil Places
