<Li> Bob Pinciotti (portrayed by Don Stark): Midge's husband, Donna's father . Bob often brags about his service in the National Guard, which invariably irritates Red . Bob is also known for walking around his house with his robe wide open and no underwear . He eats constantly, even in bed . Bob is almost always in a good mood and is a ladies' man . His best friend is Red, even though Red sees him as a nuisance . He usually takes the brunt of Red's abuse in a jolly manner . </Li> <Li> Laurie Forman (portrayed by Lisa Robin Kelly / Christina Moore): Eric's beautiful but evil older sister . Laurie enjoys tormenting Eric and manipulating her parents . She is promiscuous, often seen with various men, mainly Eric's friend Kelso, who cheats on his girlfriend, Jackie . Eric, Hyde, and Donna often mock her promiscuity . She also has a strained relationship with her mother, who thinks of her as a freeloader . She leaves the series during the third season but returns in a recurring role during the fifth . In season five, she and Fez marry to prevent him from getting deported . In season six, she is portrayed by a different actress, Christina Moore . </Li> <Li> Leo (portrayed by Tommy Chong): A hippie, and the owner of a Foto Hut at which Hyde once worked . Leo is an Army veteran who served in World War II, where he was awarded a Purple Heart . Leo often puts play before work and maintains an easy - going attitude in most things, business included . He disappears from the series after season four but is later referenced in season five's "The Battle of Evermore" when the gang goes on a mission to find him, but with no luck . He returns in season seven and remains on the series until the show's end . In season 8, he gets a new job working for Hyde at Grooves . </Li> <Li> Randy Pearson (portrayed by Josh Meyers): The newest member of the group, who is introduced in the final season . Randy appears laid back, gentle, polite, and a ladies' man, although later many of his flaws surface . He forms a friendship with Red after showing Red how good he is at fixing things . While Hyde, Jackie, Donna, and Kelso accept him as a new member of their group, Fez does not . Randy dates Donna for the majority of season eight, but she eventually breaks up with him . </Li>

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