German military texts enciphered on the Enigma machine were first broken by the Polish Cipher Bureau, beginning in December 1932. This success was a result of efforts by three Polish cryptologists, Marian Rejewski, Jerzy Różycki and Henryk Zygalski, working for Polish military intelligence. Rejewski "reverse-engineered" the device, using theoretical mathematics and material supplied by French military intelligence. Subsequently the three mathematicians designed mechanical devices for breaking Enigma ciphers, including the cryptologic bomb. From 1938 onwards, additional complexity was repeatedly added to the Enigma machines, making decryption more difficult and necessitating larger numbers of equipment and personnel—more than the Poles could readily produce.
On 25 July 1939, in Warsaw, the Poles initiated French and British military intelligence representatives into their Enigma-decryption techniques and equipment, including Zygalski sheets and the cryptologic bomb, and promised each delegation a Polish- reconstructed Enigma. The demonstration represented a vital basis for the later British continuation and effort.During the war, British cryptologists decrypted a vast number of messages enciphered on Enigma. The intelligence gleaned from this source, codenamed "Ultra" by the British, was a substantial aid to the Allied war effort.
So for purely entertaining value 9/10 but historical accuracy 3/10
If you still want to watch it - then please do. If not, here comes a spoiler: Group of kids in Chile goes for a trip to a remote island. One of the girls develops an insomnia induced paranoia (at least that what I think it was - but it could have been any other mental problem). Finally she jumps into water, they rescue her, but as there is no medical doctor nearby they take her to a witch doctor. The girl dies (or maybe not - the ending is really weird and does not explain anything). The end.