The baby-faced cops at 21 Jump Street back are on the case, infiltrating high schools and hanging out at the hot spots as they continue to investigate crimes. As the fourth season opens, Dennis Booker (Richard Grieco) quits the police force after ensuring the release of Officer Tom Hanson (Johnny Depp) from prison. Also starring Thomas Haden Church, Rosie Perez, Vince Vaughn and Shannen Doherty.
