Former NASA astronaut Mike Massimino puts on his old CAPCOM headset and takes us inside Johnson Space Center, with a little help from his guests, Flight Directors Emily Nelson and Royce Renfrew, and co-host Maeve Higgins.

On 9/30/16, the Rosetta spacecraft will purposefully join its Philae lander and crash into Comet 67P. Before then, StarTalk All-Stars host Natalie Starkey, co-host Chuck Nice and Rosetta Mission Project Scientist Matt Taylor review what we’ve learned.

Is the subsurface ocean on Saturn’s moon Enceladus the most likely place in our solar system to harbor life? Dive in with StarTalk All-Stars host and planetary scientist Carolyn Porco, guest NASA astrobiologist Chris McKay, and co-host Chuck Nice.

Astrobiologist David Grinspoon and his guest, Carter Emmart, take us behind the scenes to see how Carter creates a virtual “Google Map” of our universe. Plus, Chuck Nice asks them Cosmic Queries about black holes, the Big Bang, and Star Trek’s holodeck.

Water, water everywhere…and by everywhere, we mean the solar system, our galaxy, and the universe itself. Join us as we search for space water with our host, cosmochemist Natalie Starkey, co-host Chuck Nice, and planetary scientist Lindy Elkins-Tanton.

If you want to sleep tonight, skip this episode of StarTalk All-Stars. Bill Nye, Chuck Nice and virus expert Laurie Garrett examine how we’re fighting Zika, Dengue, West Nile, HIV and other viruses – and why the battle may not be going our way.

What will it take to send people to Mars safely, and bring them home again? StarTalk All-Stars host Astro Mike Massimino and co-host Maeve Higgins find out from John Charles, the Chief Scientist at NASA’s Human Research Program.

Explore SETI and the Breakthrough Listen Initiative, the most comprehensive search for extraterrestrial intelligence ever, with host Carolyn Porco, co-host Chuck Nice, and Dan Werthimer, the Initiative’s principal investigator and SETI@home co-founder.

StarTalk All-Stars Series Premiere: Host Bill Nye the Science Guy and co-host Chuck Nice answer Cosmic Queries about humanity’s major challenge, with a little help from climatologist Dr. Gavin A. Schmidt of the NASA Goddard Institute for Space Studies.