Skorpion

Capt. Aubrey Percival from SIS takes over command of the case. Franks discovers Gabrielle was a Soviet agent but is disillusioned. A hit man is already on her tail in Scotland.

Chief Supt. Franks is under pressure from Special Branch while Captain Percival is playing politics. Franks finds warns Gabrielle that a hit man is on her tail.

Special Branch take over the protection and surround Gabrielle's home. Frank's men track the hit man down to a caravan but he murders two people and slips the net.

Assassin Constant Delangre is shot dead by a sniper before Special Branch arrive with the evidence that Gabrielle is housemate Agatha, is actually communist agent who will stop her leaving for Canada.