| Name | First Aired | Runtime | Image | |
|---|---|---|---|---|
| S2005E01 | Golden Gate Bridge | 
                                                                             March 2, 2005 
                                                                                                                National Geographic 
                                                                     | 
                                45 | |
| S2005E02 | Alcatraz | 
                                                                             March 16, 2005 
                                                                                                                National Geographic 
                                                                     | 
                                45 | |
| S2005E03 | Inside The Pentagon | 
                                                                             April 1, 2005 
                                                                                                                National Geographic 
                                                                     | 
                                45 | |
| S2005E04 | World's Busiest Port | 
                                                                             May 13, 2005 
                                                                                                                National Geographic 
                                                                     | 
                                45 | |
| S2005E05 | Tau Tona - City Of Gold | 
                                                                             May 27, 2005 
                                                                                                                National Geographic 
                                                                     | 
                                45 | |
| S2005E06 | Las Vegas | 
                                                                             June 22, 2005 
                                                                                                                National Geographic 
                                                                     | 
                                45 | |
| S2005E07 | Ultimate Oil Sands Mine | 
                                                                             July 20, 2005 
                                                                                                                National Geographic 
                                                                     | 
                                45 | |
| S2005E08 | Ekati Diamond Mine (Diamond Diggers) | 
                                                                             July 27, 2005 
                                                                                                                National Geographic 
                                                                     | 
                                45 | |
| S2005E09 | Sea Launch | 
                                                                             August 3, 2005 
                                                                                                                National Geographic 
                                                                     | 
                                45 | |
| S2005E10 | North Sea Wall | 
                                                                             August 17, 2005 
                                                                                                                National Geographic 
                                                                     | 
                                45 | |
| S2005E11 | The World's Most Extreme Island (Impossible Islands) | 
                                                                             September 4, 2005 
                                                                                                                National Geographic 
                                                                     | 
                                45 | |
| S2005E12 | Indy Motor Speedway | 
                                                                             September 13, 2005 
                                                                                                                National Geographic 
                                                                     | 
                                45 | |
| S2005E13 | Port of Rotterdam (Super Port) | 
                                                                             September 13, 2005 
                                                                                                                National Geographic 
                                                                     | 
                                45 | |
| S2005E14 | Air Force Transport | 
                                                                             September 20, 2005 
                                                                                                                National Geographic 
                                                                     | 
                                45 | |
| S2005E15 | North Branch Correctional Institution (Hi-Tech Prison) | 
                                                                             September 27, 2005 
                                                                                                                National Geographic 
                                                                     | 
                                45 | |
| S2005E16 | World's Biggest Airliner (Airbus A380) | 
                                                                             October 4, 2005 
                                                                                                                National Geographic 
                                                                     | 
                                45 | |
| S2005E17 | Submarine: USS Virginia | 
                                                                             October 18, 2005 
                                                                                                                National Geographic 
                                                                     | 
                                45 | |
| S2005E18 | Ultimate Casino | 
                                                                             October 18, 2005 
                                                                                                                National Geographic 
                                                                     | 
                                45 | |
| S2005E19 | The Ultimate Roller Coaster | 
                                                                             October 25, 2005 
                                                                                                                National Geographic 
                                                                     | 
                                45 | |
| S2005E20 | Norad (Spy Fortress) | 
                                                                             October 25, 2005 
                                                                                                                National Geographic 
                                                                     | 
                                45 | |
| S2005E21 | Berlin's Grand Central (Berlin Train Terminal) | 
                                                                             November 15, 2005 
                                                                                                                National Geographic 
                                                                     | 
                                45 | |
| S2005E22 | America's Biggest Dig | 
                                                                             November 22, 2005 
                                                                                                                National Geographic 
                                                                     | 
                                45 | |
| S2005E23 | Ultimate Oil Rigs | 
                                                                             December 6, 2005 
                                                                                                                National Geographic 
                                                                     | 
                                45 | |
| S2005E24 | Baikonur Cosmodrome | 
                                                                             December 13, 2005 
                                                                                                                National Geographic 
                                                                     | 
                                45 | |
| S2005E25 | Inside Grand Central | 
                                                                             December 18, 2005 
                                                                                                                National Geographic 
                                                                     | 
                                45 | |
| S2005E26 | The World's Tallest Bridge | 
                                                                             December 20, 2005 
                                                                                                                National Geographic 
                                                                     | 
                                45 | |
| S2005E27 | 
                                    
                                        Mega Ship
                                    
    
                                                                             season finale 
                                                                     | 
                                
                                                                             December 27, 2005 
                                                                                                                National Geographic 
                                                                     | 
                                45 |