After botching an assignment, Penhall is transferred to a different precinct where he learns the cops routinely accept bribes and finds himself the subject of a Jump Street investigation.

21 Jump Street (1987) Season 4 Episodes...

• s04e01 - Draw the Line
• s04e02 - Say It Ain't So, Pete
• s04e03 - Eternal Flame
• s04e04 - Come from the Shadows
• s04e05 - God is a Bullet
• s04e06 - Old Haunts in a New Age
• s04e07 - Out of Control
• s04e08 - Stand by Your Man
• s04e09 - Mike's P.O.V.
• s04e10 - Wheels and Deals (2)
• s04e11 - Parental Guidance Suggested
• s04e12 - Things We Said Today
• s04e13 - Research and Destroy
• s04e14 - A Change of Heart
• s04e15 - Back from the Future
• s04e16 - 2245
• s04e17 - Hi Mom
• s04e18 - Awomp-Bomp-Aloobomb, Aloop Bamboom
• s04e19 - La Bizca
• s04e20 - Last Chance High
• s04e21 - Unfinished Business
• s04e22 - Shirts and Skins
• s04e23 - How I Saved the Senator
• s04e24 - Rounding Third
• s04e25 - Everyday is Christmas
• s04e26 - Blackout

21 Jump Street (1987) Show Summary

The series focuses on a group of police officers headquartered at the eponymous address. These officers are all young and have especially youthful appearances, which allows them to pass for teenagers. Their assignments generally consist of undercover work in high schools or, less commonly, colleges, where they generally investigate drug trafficking and abuse. The show's plots cover issues such as alcoholism, hate crimes, drug abuse, homophobia, AIDS, child abuse and sexual promiscuity. Similarly, each problem is often solved by the end of the hour-long episode, giving an implicit moral about the impact of a particular activity.