21 Jump Street was a FOX action/drama series that ran for five seasons (1987-1991). The show revolved around a group of young cops who would use their youthful appearance to go undercover and solve crimes involving teenagers and young adults. 21 Jump Street propelled Johnny Depp to stardom and was the basis for a 2012 comedy/action film of the same name.
Jack Bauer, agent of CTU (Counter Terrorist Unit) faces threats against his country and himself in this action packed show. Each season contains of one day, each episode shows one hour of Jack Bauer's day. 24 is the only action show in real time and gained alot of fans during the years with this concept.