Episode 1: Images of New Worlds, with David Lafreniere

Episode 2: Life, the Universe and Everything, with Dan Falk

Episode 3:  Exploring Saturn, with Carolyn Porco

Episode 4: The Afterlives of Stars, with Victoria Kaspi

Episode 5: The Transit of Venus, with Jay Pasachoff

Episode 6: Zooniverse and Citizen Science: How 300,000 People Became Astronomers, with Chris Lintott

Episode 7: The Business of Space Exploration, with Chuck Black

Episode 8: The Physics of Astronomy, with Maten Van Kerkwijk

Episode 9: Ancient Egyptian Astronomy, with Sarah Symons

Episode 10: The Illusion of Time? With Julian Barbour

Episode 11: The James Webb Space Telescope: Building the Successor to Hubble, with Neil Rowlands

Episode 12: Quasars: Clues to the Ancient Universe, with Patrick Hall

Episode 13: Ancient Aliens, Astrology, and Pseudoastronomy with Guy P. Harrison

Episode 14: Particle Physics and its Cosmological Implications, with Wendy J. Taylor

Episode 15: Sharing a Passion for Astronomy, with John Percy

Episode 16: Curiosity on Mars, with Ralf Gellert

Episode 17: The Mysterious Center of the Milky Way Galaxy, with Leo Meyer

Episode 18: Hosting the World’s Longest Running Science Show, with Bob McDonald

Episode 19: Gravity Waves: Opening a New Window on the Cosmos, with Luis Lehner

Episode 20: A Universe From Nothing? With Lawrence Krauss

Episode 21: The Great Stories of Science, with Stuart Clark

Episode 22: Magnetism: Probing Planets and Searching for Life, with Sabine Stanley

Episode 23: Studying the Universe’s Large Scale Structure from the South Pole, with Keith Vanderlinde

Episode 24:  Atmospheres & Signs of Life on Planets Beyond Our Solar System, with Sara Seager

Episode 25: Past Life and Humanity’s Future on Mars, with Dr. Chris Mckay

Episode 26: Exposing the Many Faces of Planet X, with Stuart Robbins

Episode 27: The Birth and Death of Stars: Clusters, Supernovae & Gamma-Ray Bursts, with Chris Matzner

Episode 28: A Current in Space Interregnum

Episode 29: The Search for Extraterrestrial Intelligence, with Seth Shostak

Episode 30: Hacking the Future of Space Exploration, ft. the International Space Apps Challenge

Episode 31: Branding the Space Industry in the 21st Century, with Laila Zichmanis

Episode 32: The Space Between the Stars, with Christopher McKee

Episode 33: But What is Space Anyway? A Philosopher’s Eye on Astronomy, with James Robert Brown

Episode 34: The Intimate Relationship Between Galaxies and Dark Matter, with Anne-Marie Weijmans

Episode 35: Chasing Comets, with David Levy

Episode 36: Quantum Computing: Space Science Meets Science Fiction, with Martin Laforest

Episode 37: Organized Activism for Space Exploration, with Wayne Ellis

Episode 38: Hunting Extraterrestrials, with Jill Tarter

Episode 39: Return to the Moon: Upcoming Rover Missions to the Lunar Surface, with Peter Visscher

Episode 40: Into Darkness: The Study of Dark Energy in the Universe, with Matt Dobbs

Episode 41: Astrobiology: The Search for Life’s Origins, with Paul Higgs

Episode 42: The Changing Neighborhood: Stars and their Galaxies, with Christine Wilson

Episode 43: A Brief Tour of Home, with Jim Bell

Episode 44: Art at the Final Frontier, with Catherine Hazin

Episode 45: Satellite Communication: The Technological Foundation of a Nation, with Peter Garland

Episode 46: A Space Travel Agent and A Space Journalist, with Leon Graafland and Elizabeth Howell

Episode 47: Quasars, Supernovae, Hypernovae and other Gamma Ray Exotica, with David Hanna

Episode 48: Science and Technology at the Cutting Edge of Exoplanet Research, with Olivier Guyon

Episode 49: Enduring Mysteries of the Early Universe, with Mark Halpern

Episode 50: Mapping Our Galactic Neighborhood: Dark Matter, Galactic Collisions & Our Local Sheet

Episode 51: Quasar Storms of the Early Universe, with Sarah Gallagher

Episode 52: Neutrino Geophysics: Journey to the Centre of the Earth

Episode 53: Stump the Astronomer! at International Astronomy Day 2014 

Episode 54: The Astronomy of Shakespeare, with Dan Falk

Episode 55: Where Have All The Anti-Matter Gone?, with Scott Menary 

Episode 56: The Art of Astrononomy, with Robin Kingsburgh

Episode 57: Exoplanets: A Retrospective Survey and the Road Ahead, with Paul Delaney

Episode 58: The Mandate of Heaven: Ancient Chinese Astronomy, with David Pankenier

Episode 59: Brown Dwarfs: Super Planet or Failed Star?, with Stanimir Metchev

Episode 60: Building the Cities of our Universe, with Pauline Barmby

Episode 61: Molecules: Where Chemistry Meets Astronomy, with Jan Cami

Episode 62: Gardening the International Space Station, with Gioia Massa

Episode 63: The Dark Stringy Universe, with Jim Cline

Episode 64: Echoing Through Space, with Doug Welch

Episode 65: Bringing MRIs Into Space, with Gordon Sarty

Episode 66: Blue Stragglers: The Stars That Shouldn’t Exist, with Alison Sills

Episode 67: The Accelerating Universe, with Nobel laureate Brian Schmidt

Episode 68: Inspiring Images of the Cosmos, with Jayanne English

Episode 69: Dynamic Stars and Ubiquitous Disks: Part 1, with Aaron Sigut and Carol Jones

Episode 70: Dynamic Stars and Ubiquitous Disks: Part 2, with Aaron Sigut and Carol Jones

Episode 71: 2014: An Amazing Year for Space Exploration, with Kevin Shortt

Episode 72: The Changing International Landscape for Space Exploration, with Kevin Shortt

Episode 73: Things That Explode, with Christian Ott

Episode 74: The Disappearing Martian Atmosphere, with David Brain

Episode 75: Secrets From the Early Universe, with Marc Kamionkowski

Episode 76: Introducing the Thirty Metre Telescope, with Raymond Carlberg

Episode 77: Cosmic Magnetism, with Jo-Anne Brown

Episode 78: Robotic Explorers that Think for Themselves, with Raymond Francis

Episode 79: Governing Outer Space, with Lorna Jean Edmonds