Sunday, August 5 at 4 a.m. ET
Monday, August 6 at 1 a.m. ET

The Soviet Union may no longer exist, but we still live in world where careful intelligence gathering can be more lethal than a missile strike.

The recent arrest of FBI agent Robert Hanssen proves how vulnerable we are to threats -- not from countries hostile to the U.S. -- but from within.

Hanssen was a trusted counterintelligence specialist who sold hundreds of our most closely guarded secrets to the Russians.

With no clear way to differentiate friends from foes, how can America protect itself?

Linda Vester hosts this one-hour look at the subversive world of espionage.


• Shocking revelations about the KGB's activities in America

• A rare interview with the CIA spy convicted of arming Qaddafi

• The war against corporate espionage

• Some of the most amazing spy gadgets

• The Washington D.C. you don't see