| Credited cast: | |||
| Lee Marvin | ... | Self - Narrator | |
| The 5th Dimension | ... | Themselves | |
| Rest of cast listed alphabetically: | |||
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Steve Mills | ... | Self |
This program is a "kaleidoscopic preview of a most exciting, entertaining, and educational television special, IT COULDN'T BE DONE, which the Bell System will sponsored on Thursday evening, April 2 at 7:30 pm (EST)." This quote is from the offical program guide for the telecast. The program covered the building of the Hoover Dam, the Transcontinental Railway without power tools or dynamite, Mount Washington Cog Railroad, Georgia's Stone Mountain sculpture (largest in world), Chief Crazy Horse (as large as the four Mount Rushmore heads combined), Indiana's Soldiers and Sailors Mounument,Great Serpent Mound in Ohio (5,000 years old), Panama Canal, Erie Canal, Eads Bridge, Brooklyn Bridge, Golden Gate Bridge, Royal Gorge Bridge, Mackinac Bridge, Chesapeake Bay Bridge-Tunnel, Holland Tunnel, Watts Towers, Falling Waters House by Frank Lloyd Wright, Annunciation Greek Orthodox Church Milwaukee Wisconsin, World Trade Center Towers (in progress), Empire State Building, NASA Launch Complex 39... Written by Dr. Ali Fant, WB5WAF