Armed with just a pencil and paper, suburban mother Elizebeth Friedman cracks the codes that bring down the mob, save countless lives in World War II, and prevent a Nazi invasion of America.
A naval officer with a penchant for crosswords attempts stop the Japanese onslaught and turn the War in the Pacific in America's favor following the horror of the attack on Pearl Harbor.
Criminal gangs across the world use highly encrypted phones to stay under the radar; the police are always one step behind until a team of investigators works out how to turn the phones against the criminals and catch them red-handed.
An encrypted German telegram could save Britain in its darkest hour; a team of eccentric geniuses attempts to decode the message in time, even if revealing its contents may forever damage Britain's relationship with its ally, America.
The roller-coaster ride of cracking humanity's most complex and important code - the Human Genome. Unravelling its secrets pushes modern science to its very limits - pitting molecular biologists against big business in the race to stop mankind's own genetic code being sold.