Screech spoke to Us Magazine about his upcoming "Saved By the Bell" tell-all, which is not out yet probably because none of it is actually true and the second he "releases" it he'll probably be sued a new asshole.

I could smell a certain 'smoke,' wafting from from the crack" underneath his castmates' dressing rooms, says Diamond, 32, who played the dork Screech.

Diamond — who filed for bankruptcy in 2001 and had his own sex tape released in 2006 — goes on to say his costars hooked up off-camera.

"If Kelly [Tiffani Thiessen] was interested in Slater [Mario Lopez] one week, then backstage there was a lot going between them in Mario [Lopez]'s room," he tells the new Us Weekly. "Then, if Jessie [Elizabeth Berkley] kisses Zack, then you know Elizabeth Berkley is going in Mark-Paul's room." (Source)

So all of this drug use and hooking up Screech alleges, none of it he actually saw with his own actual eyes. What a shocker. I think this weird smoke he thinks he smelled was probably just the distinct aroma of pretty young popular people being functional and normal. Obviously that would be pretty unsettling for a guy like Screech.