THIS WORLD MYSTERY FLIGHTS

Mystery flights - on BBC Two

This World pieces together the jigsaw of "extraordinary rendition", the alleged illegal CIA transfer of terror suspects to secret prisons in Europe.

In far Eastern Poland in 2002 and 2003 strange planes landed on an old disused runway in a secluded forest. Nine times.

Was Poland a staging point in the network of secret prisons established by the United States in their "extraordinary rendition" programme? Did these mystery flights bring al-Qaeda suspects to Poland?

Poland is not alone: it is alleged that the CIA flew their planes to 29 different countries; that there were 300 CIA landings in Europe alone, 80 in Britain.