Kevin (Justin Hartley), Kate (Chrissy Metz), and Randall (Sterling K. Brown) will always be known as the Big Three on This Is Us, but it’s hard to forget they had another brother, Kyle, who didn’t make it.
In this flashback video, Jack (Milo Ventimiglia) and Rebecca (Mandy Moore), mourn the loss of Kyle — their biological triplet who didn’t survive and take a moment to talk about their sadness.
“I can’t stop thinking about the one we lost, Jack. I can’t. I know we have these new babies and I know we should be happy, but I just can’t stop thinking about him,” Rebecca says. Watch the clip above to see the sweet moment.