AceShowbiz -

Lifetime has offered a first look at "The Unauthorized Saved by the Bell Story" via a clip. The video highlights the tension on the set of "Saved by the Bell" as the actors who portray the cast of the 1990s popular sitcom are fighting during a promotional photo shoot.

The TV movie takes viewers behind the scenes of the NBC show. It features Dylan Everett as Mark-Paul Gosselaar, Sam Kindseth as Dustin Diamond, Julian Works as Mario Lopez, Alyssa Lynch as Tiffani-Amber Thiessen, Tiera Skovbye as Elizabeth Berkley, and Taylor Russell McKenzie as Lark Voorhies.

The film is loosely based on Dustin Diamond's 2009 tell-all book "Behind the Bell". Mark-Paul Gosselaar recently commented on the book, "It is negative." He went on telling HuffPo Live, "That I must say. Everything I've heard about his book is it is negative. I don't remember those things. My experience on the show was very positive."

"That's why when people say, 'Oh, you don't like talking about it,' I don't mind talking about it, I just don't really remember that time ... everything I do remember was extremely positive," the former Zack Morris depicter continued, adding that what's in Diamond's book was "his perspective."

Diamond said in his book that Gosselaar used steroids before production of the series sequel, "Saved by the Bell: The College Years". He also claimed his former co-stars used drugs on the set and would hook up off-camera.