Was Dana, Karen, and Mark's real father ever mentioned?
Was Al, Brendon, and J.T.'s real mother ever mentioned?

Not that I can think of. I always wondered the same thing... like why they never mentioned their real parents. That's probably the one thing that bugs me about SBS is the lack of in depth explanation. It's as if the writers thought we were stupid :rolleyes: .

Frank's first wife (JT's, Al's and Brendan's mother) obviously left her family to become a dancer in Las Vegas or something like that.

odd vints ex wife n mamas family left to do same thing lol

I think Frank mentioned she did do somthing like that. Carol said she got divorced, and her husband told her shed be worthless without him. So they probably dont mention them because they were jerks.

At least Frank's ex-wife didn't get alimony, like poor Alan's ex-wives on "Two and a half men".