Dan Reynolds, the frontman of Imagine Dragons, was raised by his devout "super-mom," Christene, in the Mormon community. We meet Dan's eight siblings one of whom is now his attorney, and another his manager.

Pharrell Williams and Dave Grohl, both scared of disappointing their public school teacher mothers, started music careers in small hometowns in Virginia, unlikely launchpads for international rockstars.

Brandi Carlile, once a tomboy kid who didn't fit in, has become a successful, Grammy Award winning, openly gay singer-songwriter. After we learn about the profound musical influence her family had on Brandi, she and Teresa open up to Dave and Ginny.

Tom Morello, a musician and political activist known for his tenure with the bands Rage Against the Machine and Audioslave, grew up as the only black kid in an all-white Midwest suburb. By his side was his single white mother, Mary Morello.

Behind famous Rush frontman Geddy Lee is the riveting story of his 95-year-old mother, Mary Weinrib, a Holocaust survivor from Poland. Dave Grohl, a life-long fan of Rush, gets Geddy to open up about how his mother's tale of resilience.