Investigate!
Episode: 1x01 | Airdate: Jan 19, 2002
Season 1
Wheels
Episode: 1x02 | Airdate: Jan 26, 2002
Animal Behavior
Episode: 1x03 | Airdate: Feb 2, 2002
Water
Episode: 1x04 | Airdate: Feb 9, 2002
Rocks
Episode: 1x05 | Airdate: Feb 16, 2002
Flight
Episode: 1x06 | Airdate: Feb 23, 2002
Weather
Episode: 1x07 | Airdate: Mar 2, 2002
Technology
Episode: 1x08 | Airdate: Mar 9, 2002
Plants
Episode: 1x09 | Airdate: Mar 16, 2002
Air
Episode: 1x10 | Airdate: Mar 23, 2002
Human Behavior
Episode: 1x11 | Airdate: Mar 30, 2002
Space
Episode: 1x12 | Airdate: Apr 6, 2002
Human Body
Episode: 1x13 | Airdate: Apr 13, 2002
Season 2
Investigate!
Episode: 2x01 | Airdate: Jan 18, 2003
Structures
Episode: 2x02 | Airdate: Jan 25, 2003
Sports Science
Episode: 2x03 | Airdate: Feb 1, 2003
Spinning
Episode: 2x04 | Airdate: Feb 8, 2003
Propulsion
Episode: 2x05 | Airdate: Feb 15, 2003
Human Body
Episode: 2x06 | Airdate: Feb 22, 2003
Sound
Episode: 2x07 | Airdate: Mar 1, 2003
Technology
Episode: 2x08 | Airdate: Mar 8, 2003
Ecosystems
Episode: 2x09 | Airdate: Mar 15, 2003
Underwater
Episode: 2x10 | Airdate: Mar 22, 2003
Mammals
Episode: 2x11 | Airdate: Mar 29, 2003
Earth Explorations
Episode: 2x12 | Airdate: Apr 5, 2003
Creepy Crawlies
Episode: 2x13 | Airdate: Apr 12, 2003
Season 3
Investigate!
Episode: 3x01 | Airdate: Jan 15, 2004
Sports Science
Episode: 3x02 | Airdate: Jan 22, 2004
Wind
Episode: 3x03 | Airdate: Jan 29, 2004
Forensics
Episode: 3x04 | Airdate: Feb 5, 2004
Engineering
Episode: 3x05 | Airdate: Feb 12, 2004
Planet Earth
Episode: 3x06 | Airdate: Feb 19, 2004
Animal Behavior
Episode: 3x07 | Airdate: Feb 26, 2004
Speed
Episode: 3x08 | Airdate: Mar 4, 2004
Health
Episode: 3x09 | Airdate: Mar 11, 2004
Habitats
Episode: 3x10 | Airdate: Mar 18, 2004
Games
Episode: 3x11 | Airdate: Mar 25, 2004
Space
Episode: 3x12 | Airdate: Apr 1, 2004
Dogs
Episode: 3x13 | Airdate: Apr 8, 2004
Season 4
Energy
Episode: 4x01 | Airdate: Jan 13, 2005
Engineering
Episode: 4x02 | Airdate: Jan 20, 2005
Animal Behavior
Episode: 4x03 | Airdate: Jan 27, 2005
Friction
Episode: 4x04 | Airdate: Feb 3, 2005
Sound
Episode: 4x05 | Airdate: Feb 10, 2005
Canines
Episode: 4x06 | Airdate: Feb 17, 2005
Science at Play
Episode: 4x07 | Airdate: Feb 24, 2005
Earth Systems
Episode: 4x08 | Airdate: Mar 3, 2005
At the Zoo
Episode: 4x09 | Airdate: Mar 10, 2005
Chemistry
Episode: 4x10 | Airdate: Mar 17, 2005
Human Body
Episode: 4x11 | Airdate: Mar 24, 2005
Mammals
Episode: 4x12 | Airdate: Mar 31, 2005
Simple Machines
Episode: 4x13 | Airdate: Apr 7, 2005
Season 5
Pittsburgh
Episode: 5x01 | Airdate: Apr 6, 2006
Dallas and Ft. Worth
Episode: 5x02 | Airdate: Apr 13, 2006
Los Angeles
Episode: 5x03 | Airdate: Apr 20, 2006
Minneapolis and St. Paul
Episode: 5x04 | Airdate: Apr 27, 2006
New York
Episode: 5x05 | Airdate: May 4, 2006
Arizona
Episode: 5x06 | Airdate: May 11, 2006
San Francisco
Episode: 5x07 | Airdate: May 18, 2006
Season 6
Alaska
Episode: 6x01 | Airdate: Apr 12, 2007
New Mexico
Episode: 6x02 | Airdate: Apr 19, 2007
North Carolina
Episode: 6x03 | Airdate: Apr 26, 2007
Montana and Yellowstone
Episode: 6x04 | Airdate: May 3, 2007
New England
Episode: 6x05 | Airdate: May 10, 2007
The Deep South
Episode: 6x06 | Airdate: May 17, 2007
Hawaii
Episode: 6x07 | Airdate: May 24, 2007
Season 7
Size and Scale
Episode: 7x01 | Airdate: Nov 13, 2008
Structure of Matter
Episode: 7x02 | Airdate: Nov 20, 2008
Small is Different
Episode: 7x03 | Airdate: Nov 27, 2008
Forces at the Nanoscale
Episode: 7x04 | Airdate: Dec 4, 2008
Applications
Episode: 7x05 | Airdate: Dec 11, 2008
Nanotechnology and Society
Episode: 7x06 | Airdate: Dec 18, 2008