There have been millions of UFO sightings throughout the world and there are hundreds of thousands of people who claim to have first hand experience of Alian intrusions. If you analyze them, nearly 80% of them tell the same story and describe similar things done to them.
I love all these Psi-Fi and super-natural phenomenons and have spent nearly 6 months trying to find some direction and after all that, I got convinced that there exists some form of life out there.
After having learned about UFOs and possibility of Aliens Existence, I went to mosque and asked Khateeb about Islamic view of Aliens. He quoted me two references and mentioned that in the light of Islam, we can assume Aliens exist.
1) He mentioned Allah calls himself God of "Rab-ul-Aalameen". God of Worlds and it is possible this God is referring to them when he is calling himself God of Multiple Words, but it is just a hint not any confirmation.
2) God said near the day of Qayama (the Judgment Day), We will show you our Creations (Krishmay) above in the sky. This is yet another hint that something would be seen in the sky towards the End of Time.
Search over internet, you will find a video by the name "Ancient Astronauts". Its a wonderful Video Series that tells concept of flying and creature coming from the skies is not recent.
Regarding The Arrivals, I respect director's opinion he is not always logical and rational in the series. Go through whole series and you will find he has also included concepts that are just Imagined or they are poorly supported with reasoning and proofs. So on the basis of these videos, you cannot deny whole lot evidences available that indicate about existence of Aliens and Visitors from the outer space.