After being diagnosed with terminal leukemia, Diane Nguyen focuses on positivity and humor and celebrating the little moments that matter most.

Bob Charland creates Pedal Thru Youth, a nonprofit that fixes old bicycles and donates them to underprivileged youth.; Ellie Oben takes solace in her faith as she battles breast cancer.

The Season 2 premiere of the documentary series, which shares compelling stories of real-life superheroes who are facing terminal illness. They're a reminder that having a limited amount of time doesn't mean one can't make a positive impact on the world.