The Pearsons gather to celebrate their 40th birthday while musing about the day they were born.

Cast: Milo Ventimiglia, Mandy Moore, Sterling K. Brown, Chrissy Metz, Justin Hartley, Susan Kelechi Watson, Chris Sullivan, Jon Huertas, Niles Fitch, Logan Shroyer, Hannah Zeile, Mackenzie Hancsicsak, Parker Bates, Lonnie Chavis, Eris Baker