“We just never know what we’re going to see on ‘This Is Us,’ ” she explained. “I think the idea that you never know if you’re going to feel happy or sad or confused or just be on the edge of your seat — there’s such a variety of emotional experiences, and you’re always surprised. And the crying often comes when something unexpected happens. You’re not looking for it, and then it hits you so hard because it’s such a deep experience for the character.”