Greg and David host musician and actress Mandy Moore, who reveals herself to be a Greg O’Brien superfan, telling Greg, “I love this podcast.” Moore has listened to every episode, she says, as she portrays her role Rebecca Pearson on the NBC show, “This is Us.” The character develops dementia as she ages from her mid-20s to mid-to-late-80s, during the six seasons of the show. Moore also is a strong voice in the Alzheimer’s community, working with the organization Us Against Alzheimer’s to share information about how women are impacted by dementia what people can do to protect their brains.