Zack Attack! Mark-Paul Gosselaar Looks Back at 10 Roles

Law & Order: SVU (2001)
Peter Ivanhoe, a.k.a. Wesley Jansen
While working on D.C., Gosselaar routinely told Wolf's producers to keep him in mind for a guest spot. They cast him as a gay porn star. ''That's the role they came up with,'' he says, with a chuckle. ''It was a great role, so I was pleased to be given the opportunity, but I had just signed on to do NYPD Blue, and they had no idea I was going on Law & Order: SVU until it actually aired. One of the NYPD Blue executive producers, who had been a detective for 25 years, was very disappointed — in a fun way, I think. ''You're playing a cop now, and then you're a gay porn star?''