Billy Hallowell sits down with Sam Asghari, an Iranian immigrant who shares a powerful perspective on the protests, the Iranian people’s longing for freedom, and why this moment could be a historic turning point for the nation.

Mr. Asghari, an actor and model and the ex-husband of Britney Spears, reflects on growing up in Iran, the dangers citizens face when speaking out, and the heartbreaking reality of protests that have cost thousands of lives. He also explains why millions of Iranians — both inside the country and across the diaspora — believe this moment could finally open the door to change after decades under the Islamic Republic.