#1 | 15.03.2012Episode 1 (Tunnel Vision)
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.
#2 | 22.03.2012Episode 2 (Extreme Surf Machine)
Returning to Tenerife to check on the world's best water park which now seems destined to remain dry after numerous problems.
#3 | 29.03.2012Episode 3 (Race to the Games)
Crews race against the clock to finish an important venue and signature landmark for the 2012 London Olympics.
#4 | 05.02.2012Episode 4 (Tunneling Through History)
Mega Builders return to Istanbul to update the Marmaray rapid-transit project, which continues to have delays.
#5 | 12.02.2012Episode 5 (Quake-Proof Bridge)
Six years after piles were pounded into the muddy bottom of San Francisco Bay the new Bay Bridge is about to be topped off.
#6 | 19.02.2012Episode 6 (Ice Hotel Bigger Colder)
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.