Investigation Discovery

Espionage
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Spy School

Spying seems to have existed since humans could look across at their neighbors and wonder what they were up to. Here's your chance to find out about the shadowy world of what's been called the "second-oldest profession." Be careful, though — someone may be watching.

Know Your Spies
Travel through time.

To Catch A Spy
Your challenge - uncover the spy.

Spy Tools
Ciphers and codes -- what's it all mean?
Spies Quiz
Test your knowledge of how spies work.

Private Investigation
Test your knowledge of how P.I.s work.