See 'This is Us' season 2 photos

This is Us returned Sept. 26 at 9 p.m. on NBC, with the Season 2 premiere, “A Father’s Advice,” finding the Big Three — Sterling K. Brown’s Randall, Justin Hartley’s Kevin, and Chrissy Metz’s Kate — celebrating their 37th birthday. “They’re again at big junctures in their personal, professional, and romantic lives,” co-showrunner/exec producer Isaac Aptaker told us in our Fall TV preview. He also made a promise: “A big piece of the puzzle of Jack’s death will be answered in the first episode.”

Check out these new photos from the drama’s return and get those theories going.