Of course 21 Jump улица, уличный which made Johnny a teen-idol<3 Johnny's character is Officer Tom Hanson. The plot: "21 Jump Street» - a team of four police officers headed by Captain Fuller. Young police officers are working "under cover" over the disclosure of cases in schools. Their task - to stop crime among young people.
This was in 1987 from TV Показать Called 21 Jump Street. And they made a movie in 2012 about this TV Показать with the same name and Johnny Depp did a Cameo in it :)