
Philly Mega Transit
WTF rides the rails in the City of Brotherly Love. While there, Riley teams up with crews of the nation's fifth largest public transportation system, Philadelphia's SEPTA, to find out what it takes to keep 2,200 miles of tracks safely running. The team must replace a three-mile section of 80-year-old high-voltage wire. It's a risky operation, with live wires just an arms reach away. Then, Riley heads to the garage to work on a train with a malfunctioning automatic control system.
Player
Primary streaming server.
More from this season

S3 E1
Rocky Mountain Rigging
Riley's headed to the Wild West - just outside Yellowstone Park near Cody, Wyo., to rebuild one of the first ski lifts in the country. Riley joins cowboys of the ski lift industry to rehab 10 towers from piles of used parts. Building just outside of picturesque Yellowstone in the rugged back country presents additional challenges. To get several of the towers up the mountain, the guys bring in a special helicopter to crane the materials into place. It's an incredibly delicate operation.

S3 E2
Extreme Bridges
Riley crosses the pond to scale three iconic bridges in the U.K. The famed Tower Bridge in London is being restored, and the lead paint being stripped must be contained. In Scotland, he'll construct scaffolding at the top of the Forth Bridge, a vertigo-inducing 367 feet over the water! Just upriver, he helps implement an experimental technique to prevent a suspension bridge from collapsing.

S3 E3
Fixing Vegas
Riley travels to Las Vegas to help high-flying Cirque du Soleil solve a real showstopper of a problem - one of the world's largest, most technologically advanced stages is broken. To make the repair, Riley and team have to lower the 80-ton stage and take a look inside - a process never before attempted. While in Sin City, Riley helps repair some of most amazing spectacles on the Strip, including the world's largest video screen and high-tech water cannons in the Bellagio fountain.

S3 E4
Extreme Heights
Riley is going to new heights. He'll hang over the edge of Las Vegas' tallest building to fix the X-Scream, a thrill ride on the Stratosphere. One of the critical safety measures needs replacing, and Riley joins the ride's head of maintenance on the very edge of the track, 800 feet above the ground, to make the fix. Then he'll dangle 500 feet over the side of the Hoover Dam to retrieve trash. Upriver from Niagara Falls, he'll hang over an unstable, overgrown cliff to eliminate loose rocks.