<P> David Barry Gray's character was introduced at the end of the fourth season and starred in two episodes of season five with Alexandra Powers . Both episodes were filmed before the fourth season had ended but were not shown until the start of season five . Neither actor was approached in regards to portraying their character in the show's fifth and final season . Michael DeLuise joined the cast part way through the fifth season and stayed on until late in the season . </P> <P> Some notable guest stars on the series include: Dom DeLuise, Josh Brolin, Mindy Cohn, Bridget Fonda, Bobby Rodriguez, Jada Pinkett Smith, Brad Pitt, Vince Vaughn, Blair Underwood, John Waters, Rosie Perez, Kareem Abdul - Jabbar, Mario Van Peebles, Christina Applegate, Pauly Shore, David DeLuise, Bradley Gregg, Jason Priestley, Christopher Titus, Sarah Buxton, David Paymer, Diedrich Bader, Russell Wong, Kelly Hu, Shannon Tweed, and Peter Berg . </P> <P> Set in a fictional city and state (Metropolis, Evergreen State) in the United States, the series was primarily filmed in Vancouver, British Columbia . It was one of the first major television series to use Vancouver as a filming location and helped to establish the city as a center for film production . </P> <P> 21 Jump Street, along with Married...with Children and The Tracey Ullman Show, debuted in the spring of 1987 . All three shows were hits with audiences and helped to establish the then - newly launched Fox network . 21 Jump Street was the first hit series for the Fox network . In August, 21 Jump Street became the first Fox series to win its timeslot against a Big three network series . In the United Kingdom, it was shown on the similarly nascent, and interrelated, Sky One, which had yet to reach a sizeable audience . </P>

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