An undercover Cole must stop a disgruntled train passenger who's strapped himself with dynamite after losing his job and custody of his child.

Barstow investigates an armed robbery that his junkie sister took part in.

RHD investigate the death of an Asian man, who is run over by a bus in Chinatown.

Cole investigates two seemingly unrelated crimes, a drive-by shooting outside a Koreatown nightclub and the massacre of a family in Van Nuys, becoming convinced that the crimes are related and that the same cop may be involved in both.

Cole and his team go into action when a veteran police officer and his trainee are gunned down in their squad car while on dinner break at a mini-mall.

Cole and his team delve into the world of high-end escort services and Internet sex when the dead body of a call girl is found on a hillside, apparently the victim of a serial rapist turned murderer.

An ex-con tips off RHD that three bodies were dumped into a nearby river -- three bodies whom seemingly had no loved ones to report them missing.

When an R&B singer is kidnapped following a barroom brawl, RHD's investigation takes them into the world of rap moguls.

The body of a well-known talent manager turns up in his swimming pool the morning after a big bash is thrown in his honor, but no one at the scene wants to talk to RHD.

RHD try to uncover the mystery of who shot the night security guard at a warehouse, where washing machines were stolen.

The fearful ex-wife of a newly-paroled gang member begs Cole for protection, because her testimony against the volatile man helped prosecutors put him away.

Cole goes undercover to bring down a group of Vietnamese gunrunners, only to find himself falling in love with the wife of the man behind it all.

Cole wants to avenge the murder of his former partner by seeing to it that the man convicted for the crime doesn't get off death row.