<Li> Michael Bendetti as Officer Anthony "Mac" McCann (1990--1991) </Li> <P> Jeff Yagher was originally cast as Officer Tom Hanson in the pilot . He was replaced after the original pilot episode was filmed, and his scenes were reshot with Johnny Depp . Midway through the first season, Frederic Forrest was replaced by Steven Williams . On the show, Forrest's character Richard Jenko is killed by a drunk driver . </P> <P> Johnny Depp left the series at the end of the fourth season, but was credited in the first two episodes of the fifth season, despite not having appeared . </P> <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>

What was johnny depp's last episode of 21 jump street
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