How to deal with Ancient aliens in the workplace?

Two of my coworkers frequently mention shows like "Encounters" or "Ancient apocalypse" or whatever. I'm not the best at debating or forming arguments against these though I do feel strongly that bold claims require better evidence than a blurry photo and an eyewitness account. How do you all go about this?

Today I clumsily stumbled through conversation and said "I'll need some evidence" and was hit with "there's plenty of evidence in the episode 'Lights over Fukushima'". I didn't have an answer because I haven't watched it. I'm 99% sure that if I watch it it's gonna be dramatized, designed to scare/freak you out a little and consist of eyewitness accounts and blurry photos set to eerie music. But I'm afraid I just sound like a haughty know-it-all if I do assert this before watching.

These are good people and I want to remain on good terms and not come across as a cynical asshole.

(Sorry if language is too formal or stilted. Not my native tongue)