Is E.T. Here?

S1, E3: In this final episode, the strongest examples of UFO evidence are put to the test in order to determine if the photos and video are real, fake, or simply have a hidden earthly explanation. If no sound answer can be conceived, and the evidence in question is deemed to have not been fabricated, then the claim of alien activity cannot be written out. What is the answer to the riddle of the skies?