By 1956 it is believed that Houghton was passing secrets to Polish spies, who sent them to the Soviets.

Agents working for the Polish spy included Irene von Jena of the Reichswehr's headquarters (Reichswehrministerium) as well as Renate von Natzmer from the same office.

They didn't want me demonstrating short-take-off-and- landing aircraft after dark, and kidnapping useful Polish spies.

Also the order indefinitely prolonged the prison sentences of everybody suspected of being a Polish spy.

Polish spies also documented German atrocities being perpetrated at Auschwitz (Witold Pilecki's report) and elsewhere in Poland against Jewish and non-Jewish populations.

He suggests that the catalyst for the tragedy was a Polish spy.

"Lazinski is actually a Polish spy, we learn in the last act," Mr. de Tomasi said recently during a rehearsal break.

All were shot in Moscow between 1936 and 1938 on trumped-up charges of being either German or Polish spies during the era of Stalin's Great Purge.

Rokossovsky held senior commands until 1937, when he became caught up in Joseph Stalin's Great Purge and accused of being a Polish spy.

Based on that version, a parody was sung in Poland in 1970s ridiculing Andrzej Czechowicz, a Polish spy styled by state propaganda as a national hero for infiltrating Radio Free Europe.