If you haven’t watched it, the documentary Unacknowledged is a great way to spend an evening. The documentary delves into conspiracy theories concerning aliens, the US military, and government secrets.
Unacknowledged differs from other conspiracy documentary’s in the way that it presents its evidence. Though much of the evidence is disputable (I don't want to spoil too much), the interviewees go beyond rural farmers and self-proclaimed experts.
Dr. Steven Greer presents brand new, top-secret evidence supporting Extraterrestrial contact including witness testimony, classified documents, and UFO footage while also exploring the consequences of ruthlessly enforcing such secrecy.
Available here: https://amzn.to/2FaO6hi
Here is the trailer...