Brainy stuff starts at 28.25 and Behind the Redwood Curtain begins at 44:50.  
Catherine talks about finishing her PANEM Katniss Cowl Wrap by Dahlia in Bloom and the Two-toned Tawashi by Maryann Walsh.  Margaret talked about knitted and crocheted jewelry:  Ribband by Laura Nelkin, Crocheted Wrap Around Bracelet by Yuli Nilssen, Kaitlyn Necklace Rose by Javori Designs, and the Gatsby Necklace by Shaina Bilow.
Catherine lays the foundation for understanding brain chemicals that make us happy and how knitting influences that.  She talks about Dr. Barry Jacoibs, EMDR, Betsman Corkhill and Stitchline.
In Behind the Redwood Curtain, Margaret talks about the Mad River (the California one.)
And in the knitting tip, Margaret talks about flipping a blocking board upright to save space.