April 7, 2006: Hour One: Bionics and Tissue Engineering
April 7, 2006: Hour Two: Fossil Fish Find / Quantum Computing
April 14, 2006: Hour One: Calorie Restriction Diet Study / Mercury and Fish
April 14, 2006: Hour Two: A Relative for Lucy / Michael Pollan and the 'Omnivore's Dilemma'
April 21, 2006: Hour One: San Francisco 1906 Earthquake
April 21, 2006: Hour Two: Physics and Music
April 28, 2006: Hour One: Methanol Economy / Nanotechnology Risks
April 28, 2006: Hour Two: Gene Therapy Risks/ Surviving Coral Bleaching / Nicholas Wade, "Before the Dawn"