Part 1

PLO Agent Famy and IRA Agent McCoy are hired to assassinate world-famous Israeli scientist David Sokarev. They are sought by British security on the streets of London.

Part 2

Sokarev reluctantly proceeds to his London engagement under the protection of veteran security agent Jimmy, an alcoholic with a maverick streak. The terrorists botch their hit and split up.

Episode 3

Wounded, McCoy stays at the suburban home of local girl Norah, who inexplicably loves the brutal killer. Police catch McCoy, and Jimmy pries out of him Famy's next plan: to kill Sokarev at Heathrow Airport.