Dr. Namrata Goswami talks about the Chinese space program and its ambitious plans for lunar exploration. Goswami is a strategic analyst on space and great power politics. She's the author of many books and articles including Great Powers and Resource Nationalism in Space soon to be published Lexington Press.

Director Robert Stone talks about his film Chasing the Moon, a three-part documentary which aired on PBS's American Experience for the fiftieth anniversary of the Apollo 11 mission.

Kim Walker talks about the history and science of cinchona bark as a tonic, medicine, and mixer. Walker is a biocultural historian completing her PhD work on the Cinchona Bark Collection at Kew Gardens. She's the co-author (along with Mark Nesbitt) of Just The Tonic: A Natural History of Tonic Water.

Amy Shira Teitel talks about Apollo and the community of people who are deeply attached to space history. Teitel is a spaceflight historian and the creator of the YouTube Channel, Vintage Space. She is also the author of two books, Breaking the Chains of Gravity: The Story of Spaceflight Before NASA and Apollo Pilot: The Memory of Astronaut Don Eisele.

David Chang talks about the history of indigenous Hawaiians (Kanaka Maoli) as explorers and geographers of the world. Chang is a professor of history at the University of Minnesota. He's the author of The World and All the Things upon It: Native Hawaiian Geographies of Exploration.

Ed Armston-Sheret talks about the mysterious disease of scurvy: how it affected expeditioners and why it was so difficult to understand. Armston-Sheret is a PhD candidate at Royal Holloway University of London. He's the author of "Tainted bodies : scurvy, bad food and the reputation of the British National Antarctic Expedition, 1901–1904," published in the Journal of Historical Geography.

Glen Asner and Stephen Garber talk about NASA's efforts to plan ambitious missions in the face of huge political and financial challenges. Asner is the Deputy Chief Historian for the Historical Office, Office of the Secretary of Defense (OSD). Garber works in the NASA History Division at NASA Headquarters. They are the authors of Origins of 21st-Century Space Travel: A History of NASA's Decadal Planning Team and the Vision for Space Exploration, 1999–2004.

Jake Robins and Michael Robinson talk about the quest to explore Mars: how it compares to earlier eras of exploration in the West and in the Arctic as well as its power to capture the imagination of thousands of people. Robins is the host of WeMartians, a podcast that considers the exploration of the Red Planet from a variety of angles, both technical and scientific.

Tina Adcock talks about the controversy over George Putnam's Baffin Land expedition and why it tells a bigger story about the changing culture of exploration in the 1920s. Adcock is an assistant professor of history at Simon Fraser University. She's the author of the essay "Scientist Tourist Sportsman Spy: Boundary-Work and the Putnam Eastern Arctic Expeditions" which was published in the edited collection Made Modern: Science and Technology in Canadian History, edited by Adcock and Edward Jones-Imhotep.

In Part II, Ruth Gruenthal continues her story of her family's escape from France in 1940. She also discusses the challenges of living in the United States after the war.