Alexandra Cousteau

Environmental Activist, Storyteller & Ocean Advocate

Joseph Stiglitz

American Economist, Professor at Columbia University & Nobel Memorial Prize in Economic Sciences 2001

Jeremy Rifkin

Leading Global Technologist, Futurist, Authority on World Economic & Environmental Trends

Wilmer Valderrama

Actor, Producer, Activist & Television Personality

Janine di Giovanni

Author, Award-Winning Foreign & War Correspondent; Visiting Fellow at Yale Law School & Executive Director The Reckoning Project

Seriously Entertaining: Janine di Giovanni on "All That Glitters"

Ken Dychtwald

Founder & CEO of Age Wave; Gerontologist & Expert on Aging-Related Issues

Paul Reiser

Actor, Writer & Stand-Up Comedian Known for Portraying Paul Buchman in "Mad About You"

Keenen Ivory Wayans

Comedian, Director & Writer; Known for "White Chicks" and "In Living Color"