(Premiere) An undercover cop (Josh Taylor) is asked by a friend to investigate a liquor distributor dealing in stolen goods. In the opener, an old girl friend asks Riker to investigate extortion threats made on her family's nightclub.

Riker helps a woman locate her sister, who may be working as a prostitute for a pimp.

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Riker goes undercover in a prison to bust a "school" that teaches criminal techniques to inmates.

Frank sets his investigative sights on the No. 1 man in an arson-for-profit racket.