Comedian/actor Matt Champagne (twitter.com/remainchampagne) and frequent ProbSci guest Auggie Smith (twitter.com/auggiesmith) join Jesse and Andy this week for a somewhat somber episode remembering the great Robin Williams before getting into discussions about: Jesse's tiki music obsession! Harry Potter corrections! Blair Witch Project disappointments! Kilobots! Vibrating football games! An impossible space engine! The magic of Guido Fetta! The solar storm that almost rocked our world two years ago! A tick bite that makes you allergic to meat! Jesse and Auggie's groin issues!

Up-and-coming comedians Brent Schmidt (twitter.com/IAmBrentSchmidt) and Zach Pugh (twitter.com/ZachPugh) join Jesse and Andy this week to talk about: The Pickathon music festival! More headboard talk! Growing up in Sturgis, South Dakota! Re-purposing coal mines for science! Teenage nervous breakdowns! Falling off the wagon for a podcast sponsor! Losing your religion via the Internet! When did Hogwarts abandon muggle technology? The majesty of the apparently kid! Jesse's creepy nipple text from the sleep-eating roommate! Feathered dinosaurs! Forgetting about Hiroshima! The theory of humors! Tyrannosaurs hunted in packs! Growing up in a Chik-Fil-A family! Pizza Hut grease! Thinspiration! Making your body's organs transparent! Hidden biker girly magazines!

Comedian Beth Stelling (twitter.com/BethStelling) joins Matt and Andy this week for a special late-night recording in Andy's bedroom, covering: Mirrored headboards! Google's mapping of the human body! Slim Goodbody! Bats navigating via polarized light! Real 3D vs. fake 3D! Stella Luna and megabats! Gecko orgies in space! The cancer-fighting effects of cat poop! The Nobel Peace & Quiet Prize!

Comedian/director Jordan Brady (iamroadcomic.com) and his rapping, backflipping son Ben join the festivities with Matt, Andy and Jesse this week to discuss: Gangta rap historians! Jordan's invention of "bow-chicka-wow-wow"! Filming I Am Comic at the Bridgetown Comedy Festival! Matt's Last Comic Standing experience! Living like a road comic! Lacerta lizard people! Pluto possibly getting reinstated as a planet! The magic of British World Cup commentators! Suspended animation for gunshot victims! Fish-eating spiders! Grolar bears! Improving your sense of smell with the help of booze! Good news and bad news about AIDS! A new way for the Chinese to extract sperm!

Friend of the show and past guest TJ Chambers (twitter.com/tjchambersLA) rejoins the festivities this week to help Matt, Jesse and Andy get to the bottom of: Listener-made indie video games! Brooks news! Holland vs. The Netherlands! Delicious Lagunitas IPA! The TJs of porn! The origin of gangsta rap! Recording the podcast at the Gathering of the Juggalos! Chimpanzee fads! The short films of TJ Chambers! Bear fellatio! The origin of Winnie the Pooh! The Marginot Line! A massive ocean inside Earth! Volcano diamonds! An invisibility cloak for the sense of touch! The debatable cancer-prevention effects of farts! Testing for the seminal taste effects of pineapple! A real-world warp drive! Time tacos! What to do when traveling back in time! The upcoming Los Angeles Podcast Festival!

Probably History is back! This week Jesse, Richard and Andy welcome the very funny David Cope (davidcope.flavors.me) to take a stab at covering over 60 years of video game history. Enjoy!

Comedian Renee Gauthier (twitter.com/Nenegooter) and nuclear physicist/comedian Kevin Peter Hickerson (twitter.com/kphickerson) join Matt and Andy this week to talk about: Matt's inability to wink! The actual cost of going to the moon! Renee's dance lessons! Working near CERN! Studying neutrinos! Shielding your experiments with the lead from sunken Roman ships! The end of the latest season of Ridiculousness! Debunking the story about the computer that passed the Turing test! The mysterious death of Alan Turing! A massive ocean inside the earth! The tongue strength of a horned frog! Singles sites for science enthusiasts! The upcoming PhD Movie sequel (phdmovie.com)!

Dr. Christopher Schmitt (evopropinquitous.net) is a postdoctoral research fellow at the Center for Neurobehavioral Genetics at UCLA, and his research in primatology focuses on primate development and life history. He joins Jesse, Matt and Andy this week to talk about his high school experiences with field work in Argentina, primate infanticide, collecting howler monkey urine, capucin monkeys sticking their fingers in each others eyes to chill out, the risks of taking selfies with dead hippos when there are lions nearby, floating vegetation islands that transport animals, old world/new world ape divergence, why certain primates are getting obese, Koko the gorilla's nipple obsession, competing brands of chimp-taggin RFID chips and how to get involved in field work right where you live.

British comedian, actor, writer and radio personality Adam Buxton (twitter.com/AdamBuxton) joins the proceedings this week to chat about: Messing up comedians' introductions! Sci-fi coverage of the papal inauguration! The history of the Shriners! Deciding on a uniform for an evil empire! Jaundice Shitstone! The counting skills of black bears! Whittling your fingers to type on a Blackberry! A digression on areolar Montgomery glands! Are female-named hurricanes killing more people than male-named ones? Working with Edgar Wright! Chimps beat humans at game theory! Adam's childhood tours of the USA with his travel writer father! Astronomers discover a mega-Earth 560 light years away! Jesse's incredible Rocky impressions! Adam's hilarious show Bug!

Comedian/podcaster/director/writer/producer/Viner Jason Nash (twitter.com/Jason23Nash) returns to the podcast this week just ahead of the release of his first feature film to talk with the gang about: Who gets credit for living at Bluebell? Jason’s Ron & Fez appearance! The upcoming movie JASON NASH IS MARRIED that Andy produced! Shooting scenes with Andy Richter and Jon Benjamin at Bluebell! Matt’s frustration with check-obsessed America! Jason’s reaction to Zach Galifianakis in The Hangover! Erasing memories and bringing them back! Explaining binary information to Jason! New research showing how sleep is good for your memory! Jason’s upcoming appearance on Funniest Wins! New information on how the Moon was formed! Would listeners contribute to help us record the podcast in zero gravity? A debate on parabolic flights! New research on why Facebook bums you out! Jesse’s decision to leave Facebook! Shitty comedy club introductions! The discovery of the largest dinosaur ever! How changing your facial expression changes first impressions!