In series four, the CI5 protect the daughter of a visiting South American president after his son is assassinated, and the team uncover a silver bullion smuggling operation being controlled from behind the Iron Curtain.

Season 3 Episode 5 - The Madness of Mickey Hamilton

Years after a man's wife died and his child left brain-damaged following a series of blunders at the hospital they were treated at, he returns to finally seek revenge by systematically assassinating each of the same hospital's medical staff one-by-one. Air Date : 24th-Nov-1979

Season 3 Episode 1 - The Purging of CI5

CI5 and their agents find themselves under attack from a vendetta of bombings and assassination attempts. Bodie and Doyle are on a chase to find out who the perpetrators are before they end up as the next victims. Air Date : 27th-Oct-1979  Read More

Season 3 Episode 2 - Backtrack

It's just another routine house break-in for a cat burglar, until he accidentally uncovers a complex drugs smuggling operation. When CI5 step in, they realise it's not just the burglar's life that is now in danger. Air Date : 3rd-Nov-1979  Read More

Season 3 Episode 3 - Stopover

Cowley is offered the name of a highly-placed double agent from an old colleague - who in return wants to be guaranteed protection with CI5. This leads to the start of a dangerous stand-off between the two, using Bodie and Doyle as the pawns. Air Date : 10th-Nov-1979  Read More

Season 3 Episode 4 - Dead Reckoning

A spy is extradited to Britain with an attempt to keep his arrival top-secret. However, the Bulgarians from Batak's homeland who sent him appear to be trying to make his movements as public as possible. When he is eventually murdered, CI5 suspect his music student daughter of poisoning him. Air Date : 17th-Nov-1979  Read More

Season 3 Episode 5 - The Madness of Mickey Hamilton

Years after a man's wife died and his child left brain-damaged following a series of blunders at the hospital they were treated at, he returns to finally seek revenge by systematically assassinating each of the same hospital's medical staff one-by-one. Air Date : 24th-Nov-1979  Read More

Season 3 Episode 6 - A Hiding to Nothing

A dummy run that has been staged for the visit of a Middle Eastern official is found to have been recorded by a foreign student, subsequently leading CI5 to suspect a security leak. Air Date : 1st-Dec-1979  Read More

Season 3 Episode 7 - Runner

An attempt to start up a street war is launched by a gangland breakaway opposition group, but their leader appears to have an ulterior motive in his actions. Air Date : 8th-Dec-1979  Read More

Season 3 Episode 8 - Servant of Two Masters

Bodie and Doyle are shocked to discover that Cowley appears to be selling nerve gas to a group of East Germans in order to line his own pockets, and are assigned by his rival Plumb to track their boss's every move. Air Date : 15th-Dec-1979  Read More