As work progresses through the 1990s and the tunnels take shape, the true cost of the Big Dig remains unknown to the public, until a series of revelations pulls down the curtain and shakes confidence in the whole project. 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