Just an aside: I found the recent episode of
Ancient Aliens with William Shatner On-Demand and watched it.
It was a round-table discussion with various people (some scientists, religious experts & ancient alien theorists) & some video calls, along with various footage for the show.
I was impressed with how alert, cognizant, personable, and sharp Shatner appeared at age 89 (too bad
he couldn't run for President!)
He played the skeptic to the rest of the round table and asked them to convince him about ancient alien theories. He seemed pretty good at asking skeptical questions and, although I didn't really hear anything I hadn't heard before, he made the show entertaining to watch (I had a few LOL moments just watching Shatner's facial expressions he made in response to things he was hearing.).