Rick engages a panel of European tour-guide friends to find out how they're responding to recent changes in the political relationship between their countries and the US, and to discuss the home-grown populist pressures that have been gaining followers in Europe. Plus sculptor Richard Rhodes recommends European destinations with especially impressive stonework — from famous buildings to little-known sites that have endured through the ages.

Estonia's medieval charm, beautifully preserved naturescapes, and Baltic culture are cultivating a burgeoning tourism scene. Bradt guidebook author and Estonian authority Neil Taylor lets us in on the abundant appeal of the former Soviet republic. And a certified Cicerone — that's "craft beer expert" — takes us on a tour of European suds and helps us tap into the best pints across the continent.

Astronomer Philip Plait — who fell in love with Saturn after first viewing the gas giant, with its mesmerizing rings and moons, through a telescope as a child — shares some of the amazing discoveries we've made about the planet in recent years. Then actor Martin Sheen describes how his travels in the developing world have opened his eyes, and his heart, to the needs of others. And a Florence-based tour guide and culinary expert lets us in on where to find the best food in her adopted home.