Written by Eric Blakeney
Directed by James A. Contner
Airdate: February 5, 1989
Guest Stars: Michael Champion (Facility Director)
In an episode when the unit's been sent into a juvenile facility, Penhall observes "we send these kids to hell."
We also learn the unit was sent in without Fuller's permission to investigate a murder and drug trade going on inside. Booker and Ioki are pulled out quickly, while Penhall cracks up. Hanson is left going solo in the most dangerous environment yet.
The episode is like a hybrid of Midnight Express and Bad Boys. Left alone, Hanson establishes himself as "the hammer" after he takes down one of the enforcers. He looks on with indifference during a bloody fistfight and even stays on longer to finish the case after Fuller offers to get him out. There's also a sex trade going with a girl's reform school nearby and he almost decides to partake but instead collapses in tears.
At the heart of the episode is the idea that incarcerating teens only makes their problems worse. The institution is a microcosm of a criminal underworld with violence, drug trade, and sadistic guards. By the end Hanson is seriously questioning his line of work. Fuller calmly tells Hanson their job is to enforce the law - and the reality of that can get ugly.
Another strong episode because it interrogates the basis of the series. Penhall is pushed to the edges of sanity, while Hanson takes his undercover persona to its extremes. "Swallowed Alive" might've been the grittiest entry of 21 Jump Street.