• Apache Longbow, an attack helicopter used by the military
• Blackhawk, one of the most sophisticated manned helicopters in the world
• Coast Guard helicopters which fly over water on rescue missions
• Popular Robinson made helicopters used by the police and civil aviation
• RC Draganflyer X6 and Grumman MQ8 Firescout UAVs

The episode talks about how the Draganflyer RC helicopters use a new and very  very cool flight control system; which controls the RC helicopter by changing each electric motors speed individually. The simplicity and reliability of this design has applications in future helicopter designs, and also makes the Draganflyer X6 UAV perfect for aerial reconnaissance and photography. The Draganflyer X6 UAV helicopter’s advanced flight computer is also demonstrated, and the auto-land and GPS features are shown.

You can watch the episode on the History Channel, or purchase the entire season from Amazon.com.