Original broadcast date: April 7, 2017. Whether it's asking for a raise or asking for equality, speaking up can be risky — even dangerous. This hour, TED speakers share ideas and stories about taking the crucial step to say something. Guests include activists Esra'a and Dalia Mogahed, climate scientist James Hansen, social psychologist Adam Galinsky, and poet Clint Smith.

When we focus so much on achievement and success, it's easy to lose sight of joy. This hour, TED speakers search for joy in unexpected places, and explain why it's crucial to a fulfilling life. Speakers include inventor Simone Giertz, designer Ingrid Fetell Lee, journalist David Baron, and musician Meklit Hadero.

Original broadcast date: November 21, 2014. In this episode, we explore ways to find quiet in our busy lives. How can we step back and make time to reflect in an increasingly distracted and hurried world? Guests include environmentalist John Francis, authors Susan Cain and Gavin Pretor-Pinney, musician Megan Washington, and writer Pico Iyer.

Human innovation has transformed the way we live, often for the better. But as our technologies grow more powerful, so do their consequences. This hour, TED speakers explore technology's dark side. Guests include writer and artist James Bridle, historians Yuval Noah Harari and Edward Tenner, internet security strategist Yasmin Green, and journalist Kashmir Hill.

Original broadcast date: March 24, 2017. Humans have a capacity to laugh even in the hardest of times. This hour, TED speakers describe how they use humor as a weapon and a shield, to ward off doubt, discrimination, and even depression. Guests include comedians Sandi Toksvig, Maysoon Zayid, Negin Farsad, and Kevin Breel.

Original broadcast date: November 17, 2016. Food is more than nourishment. It's a source of pleasure — and guilt — and an agent of change. This episode, TED speakers explore our deep connection to food, and where it's headed. Guests include community leader Pam Warhurst, food writer Mark Bittman, pediatrician Robert Lustig, experimental psychologist Charles Spence, and entomologist Marcel Dicke.

We have a vision of justice as blind, impartial, and fair — but in reality, the law often fails those who need it most. This hour, TED speakers explore radical ways to change the legal system. Guests include lawyer and social justice advocate Robin Steinberg, animal rights lawyer Steven Wise, political activist Brett Hennig, and lawyer and social entrepreneur Vivek Maru.

For thousands of years, we've searched to answer the question: Who are we? Today, science has brought us closer than ever to the answer. This hour, TED speakers share ideas on what makes us ... us. In a brand new interview, neuroscientist Anil Seth explores how our brains construct our conscious reality--everything we perceive, from objects to emotions. Other guests from the original 2016 episode include biochemist Sam Sternberg, psychologist Steven Pinker, and humorist Ze Frank.

Cities are symbols of hope and opportunity. But today, overcrowding and gentrification are hurting their most vulnerable residents. This hour, TED speakers explore how we can build more humane cities. Guests include architects Liz Ogbu and Vishaan Chakrabarti, writer OluTimehin Adegbeye, former Albuquerque Mayor Richard Berry, and journalist Drew Philp.

Original broadcast date: February 10, 2017. We expect a lot of our doctors, but they don't always have the best tools to treat us. This episode, TED speakers explore new ways to think about disease, diagnosis, and the delicate art of healing. Guests include filmmaker Jennifer Brea, anesthesiologist Elliot Krane, law professor Dorothy Roberts, and cardiologist Paula Johnson.