[1] After school, she worked in London as a secretary before joining the Allied Control Commission and moving to West Germany.
[1] There she met her future husband, Ruari Chisholm, and began working for British Intelligence.
She would meet Penkovsky in a local park and he would offer what appeared to be sweets, but were actually disguised documents containing military secrets about the Soviet nuclear weapons arsenal.
Controversy surrounds Penkovsky's death, with many believing that MI6 put him in danger after Blake confessed all to the Soviet officials.
The programme included covert KGB photographs showing Janet Chisholm meeting Oleg Penkovsky.