I got another question though. It's about Arturo and Rembrandt. I'm confused. How was Rembrandt in the Navy when he can't swim?
You're already applying more continuity and logic to the show than the writers. When it's first mentioned in "Rules of the Game," even Rembrandt says his participation was USO-related, but that's quickly dropped the further into season three you go. You can safely ignore the Navy stuff as it plays absolutely no part in the rest of the series beyond a B-plot in "The Other Slide of Darkness." As an added bonus, there are multiple scene where the Sliders are swimming in the ocean coming your way, so Rembrandt clearly took a few lessons when we weren't paying attention.
Also, in the episode Into The Mystic (I sound like an experienced fan already!) the psychic says that Arturo has a son?! But I can't find any other reference to this kid.
And you won't - the only official callback to Arturo's son is in an interview I had with co-creator Tracy Torme ten years (!) ago: https://earthprime.com/interviews/tracy-torme-2009
25 years ago, we were lucky to get a payoff to the first season cliffhanger. "Into the Mystic" almost ran mid-season. There was no ability to follow up on loose threads due to the nature of television (and FOX programming).
And I know I'm still getting used to these characters but Arturo doesn't seem like the Dead beat type. Especially sense this kid is to be so similar to Quinn.
I think that was the point the fortune teller was trying to make - that he formed a closer bond with Quinn because of their shared interests than his own kid, who probably isn't a hardcore physicist - but we have no additional information to pull from. All we can infer is that Arturo's kid was born out of wedlock, since his own wife died early into their marriage. So it's entirely possible that his son could live far, far away, or have a strained relationship because his parents aren't together.
Am I missing something with this?
Nope, you've got a pretty good bead on things. Torme was fond of throwing a bunch of ideas out there despite not having the clout with the network to pay them off down the road. Arturo's kid, the FBI, Bennish, Arturo's illness, the right Arturo, blibbity blibbity blah...