Hes the main person on the show Ancient Aliens that posits that ETs can be found throughout the archaelogical record. Their interpretations of other's findings are interesting and clash with established dogma, especially to minds that are open to academic scientists being idiots that fight for a theory to keep their social status instead of for the truth.

Its fun and somwtimes interesting to watch, but its hard to take seriously because they are pretty bombastic in their claims to make it more outrageous for TV viewers.