Part 8: Just as the project turns the corner towards completion, its entire legacy becomes clouded. The tunnels are leaking, concrete suppliers are being arrested, and everyday drivers are forced to wonder: are these tunnels safe?

Credits:

Host and scriptwriter: Ian Coss

Executive Producer: Devin Maverick Robins

Producers: Isabel Hibbard and Ian Coss

Editor: Lacy Roberts

Editorial Advisor: Stephanie Leydon

Fact Checker: Lisa Wardle

Scoring and Music Supervision: Ian Coss

Project Manager: Meiqian He