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Tunnel Vision

Episode number: 1

Overview: Return to the 57-kilometer long high-speed rail tunnel in Switzerland's Gotthard Mountain range to see what it will take to finish the project by 2017.

Extreme Surf Machine

Episode number: 2

Overview: Returning to Tenerife to check on the world's best water park which now seems destined to remain dry after numerous problems.

Race to the Games

Episode number: 3

Overview: Crews race against the clock to finish an important venue and signature landmark for the 2012 London Olympics.

Tunneling Through History

Episode number: 4

Overview: Mega Builders return to Istanbul to update the Marmaray rapid-transit project, which continues to have delays.

Quake-Proof Bridge

Episode number: 5

Overview: Six years after piles were pounded into the muddy bottom of San Francisco Bay the new Bay Bridge is about to be topped off.

Ice Hotel Bigger Colder

Episode number: 6

Overview: Inside a famous Swedish hotel which is constructed from 10,000 tonnes of ice and 30,000 tonnes of snow, and boasts a frozen bar and cinema screen.