She portrayed Patty, a love interest for Wilmer Valderrama in two episodes, but former "Mr. Rhodes" producer Mark Brazil invited Sloane on the show to make friends with Topher Grace.

“He really liked Topher a lot… this sweet, good kid who was out from Connecticut. He wanted him to have good friends, and he always liked me and thought I was a nice, normal person who just happened to be an actor.”

http://tvline.com/gallery/memories-from-the-set-lindsay-sloane/#!6/sloane-that-70s-show/