Richard Grieco makes his last appearance as Dennis Booker on 21 Jump Street (1987). He continued playing Booker (1989) on the spin off series Booker. Peter DeLuise, Steven Williams and Holly Robinson Peete make appearances on Booker (1989) as their Jump Street characters, tying the series together.
Although credited as a guest star, Richard Greco only appears in one scene.
Lochlyn Munro's second time appearing on the show.