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