During a robbery-gone-wrong at Hudson's Bay in Toronto, Glen Flett shot and killed the store's manager. At the time, he felt no remorse for the deceased man. But his mindset changed when a beloved mother figure was killed, and he found himself on the other side of crime.

David Weissman used to spend a lot of time online trumpeting President Trump, aggressively promoting Republican values and harassing anyone who disagreed with him. But a civil exchange with comedian Sarah Silverman led the self-described troll to exit the mob, think for himself and approach political discourse with kindness and an open mind.

Kristen O'Meara chose not to vaccinate her children, despite the longstanding scientific evidence that vaccines are effective in preventing illness and that they have no correlation with causing serious or chronic illness. She tells Piya how the combination of her family falling ill and a personal conversation with a colleague convinced her to change her tune on vaccines.