21 Jump Street: Season 4, Episode 13: Research and Destroy
Starring: Peter DeLuise, Dustin Nguyen, Jane Sibbett, Joseph Kell, Yvette Nipar, Angelo Tiffe, Johnny Depp, Holly Robinson Peete
Length: 60 minutes
On Air Date: 8 Jan 1990
21 Jump Street: S04E13 Description: Hanson, Hoffs and Ioki try to discover who is making synthetic heroin and experimenting on people with it. Also, Ioki tries to help a Chinese student deal with a spy trying to bring him home, and Hoffs fends off an unwanted suitor.