In this week's Sunday Sitdown, John Stamos joins Willie Geist to share revealing details from his new memoir, "If You Would Have Told Me," his journey to "Full House," his struggle with sobriety and a last meal he shared with his late friend Bob Saget. Last week, a group of state attorneys general sued Meta, the parent company of Facebook and Instagram, over claims the company knew its products were addictive and harmful to young people. Meta denied these claims. NBC's Dana Griffin reports in this week's Sunday Focus. Dr. Rex Marco, a prominent spine surgeon at UTHealth Houston, found a new purpose in his profession when a serious bicycle accident turned him into a patient. Now at TIRR Memorial Hermann for rehab, Dr. Marco's life-changing injury has given him a new perspective on the importance of hope. NBC's Priscilla Thompson reports in this week's Sunday Spotlight. Dr. Wanda Półtawska, a Holocaust survivor who helped to treat traumatized survivors and offered counsel to Pope John Paul II, died last week at 101. Sunday TODAY's Willie Geist remembers a life well lived.