Daddy Works at Night. It's a Dirty Job.

LOS ANGELES -- A most unusual case, this Bob Saget. We were just reviewing the file, a very thick file. According to the Diagnostic and Statistical Manual of Mental Disorders, it appears that patient Saget is suffering from PFTSD (Post Family-TV Stress Disorder).

"I'm seriously messed up," Saget says. "Whatever I have, I obviously have it bad."

By his own admission, Saget is fixated on a fictional character he once portrayed on the beloved ABC sitcom "Full House" (1987-1995). It's the Saget alter ego, Danny Tanner, the wholesome father figure of three delightfully precocious daughters, including Michelle, a bobble-headed dual phantasm with strangely liquid eyes, who in Saget's dissociated state lives on (as Mr. Tanner does in endless syndication). Central to the Saget galaxy of obsessions: a compulsive devotion to his onetime co-stars, the Olsen twins, and a love of life-size dolls. Fortunately, the days of rubber rooms are long gone.

So instead, the cable broadcaster HBO has staged a very public intervention, providing Saget with a comedy special to work through his many issues. The one-hour session, appropriately labeled "Bob Saget: That Ain't Right," premieres Saturday at 10 p.m. It appears that in order to free his mind from the strings of the puppet master Tanner, Saget finds it therapeutic to mount a stage and perform his stand-up routine, which often includes painting lurid word pictures about the carnal appetites of turtles.

It is Bad Bob killing Good Bob.

It is a set so percussive with profanity, it seems almost impossible to fit one more dirty word in anywhere. It is the kind of material that would make Larry Flynt blush.

While the specifics cannot be reproduced in a wholesome newspaper, Saget in his HBO ramblings presents flights of deviant fantasy about his years of hosting "America's Funniest Home Videos" (1990-1997). This he alternates with outbursts of mock anger about his mocking portrayal on "South Park," his more recent creepy turn as a bordello's best customer on the show "Entourage" and the dirty joke documentary "The Aristocrats," all blurted out in a word salad of language so blisteringly blue that a parallel diagnosis, as Saget freely admits on HBO, of Tourette's syndrome cannot be ruled out.

Naturally, in the interest of science, we want to know: Why turtles?

We conduct our interview with patient Saget poolside by the cabanas at the W Hotel, which is, curiously, just a short walk from UCLA Institute of Neuroscience and Human Behavior.

Question: It was hard, wasn't it, all those years, the double life, the lies, being this incredibly raunchy comic while playing this little goody-two-shoes on "Full House" and "America's Funniest Home Videos"?

"I was psycho. I was psycho!" Saget says -- and off he goes. "I literally would -- you won't even want to print this, but I went to Disneyland last night with John Stamos, Dave Coulier and Lori Loughlin. We all went together, with our girlfriends and her husband."

Stamos, Coulier and Loughlin were actors on "Full House." They remain close friends, the kind of friends who visit Disneyland together as adults. Saget says, "Everybody was looking at us, you know? We're walking around, and we're acting stupid. You know, people were like walking away from us, like we're characters, Disney characters. The kids are coming over to us. What the hell are all the grown-ups from 'Full House' doing there?"