Dempsey goes undercover and infiltrates a gang after discovering a link between the London underworld and the New York police department.

While working undercover, Dempsey comes across a former nemesis from New York City.

When Dempsey is framed by another cop for something he didn't do, Makepeace risks her career to prove his innocence.

While investigating a death of a boxers, Dempsey and Makepeace discover a counterfeit money laundering scheme.

Dempsey and Makepeace go undercover as Middle East terrorists to find an arms dealer supplying several terrorist groups in Britain, Can they find the dealer and stop him.

When the main witness of a trail of a drug dealer threatens to withdraw her statement when her daughter is kidnapped, Dempsey goes to the Bogeyman for help.

When an old girlfriend of Dempsey's shows up it causes problems as Dempsey is in pursuit of a cocaine dealer.

Dempsey and Makepeace are targeted into a deadly trap which involves both jewels and bank robbers who set the trap, to even the sides Dempsey get help from a boxer who Dempsey sent to jail to help him out.

When Dempsey is nearly killed during an investigation, Makepeace resigns for good from the police force.