"Things A Mama Don't Know" is the thirteenth episode and mid-season premiere of the sixth season of One Tree Hill and the 119th produced episode of the series. It was broadcast on January 5, 2009. Peyton receives some startling news that she must share with Lucas who, while still in LA, discovers that Julian has been keeping another secret regarding the movie. Nathan struggles in a new professional environment, and Brooke's search for runaway Sam forces her to confront her own feelings about the night of her attack.