Lee starts to show the signs of burn out and begins meeting a man who has been linked to the disappearances and presumed deaths of three other burnt out agents.
One of the components of a dangerous form of nerve gas is stolen and Lee goes undercover in Amanda's neighbourhood to watch over a scientist as Amanda gets involved in anti-pollution.
When an old banker friend of Billy's is killed he leaves to investigate something called 'Cyclops'. Lee and Amanda investigate the case and Francine gets stressed doing Billy's job.