In which we celebrate the post-Valentine's season by looking back at the sleazy 1970s when adult films briefly became mainstream chic, and Ken avoids a Y2K for his marriage. Certificate #25369.

In which a veiled, fume-huffing priestess tells the ancient world what to do for over a millennium, and John only knows what time it is from his truck clock. Certificate #25192.

In which a Disneyland-trained dreamer invents a new art form with the help of a cookie entrepreneur and a jellybean innovator, and Ken has a theory about the worst balloon vendors. Certificate #32691.

In which an inescapable awards-season acronym is jump-started twenty-five years earlier by an eccentric TV cop actor and a pop reference book, and John's family would like to kick in hotel room doors. Certificate #42952.

In which an Atlanta pastor changes his name after a very inspiring visit to Germany and begins an American civil rights dynasty, and Ken gets to make a chart. Certificate #45274.

In which scientists and paranormal investigators puzzle over a string of mysterious deaths beginning with a "dull and heavy" Italian countess, and John learns about the peat of the Maldives. Certificate #40714.

In which British investors power the Industrial Revolution with arguably too many waterways for the nation's barges, and Ken thinks escalators are not cheating. Certificate #27217.

In which a solar storm in 1859 leads to eye-popping auroras and a harboring of technological doom, and John compares gold pan and pizza sizes. Certificate #54094.

In which the childhood Christmas tradition of two Georgia twins becomes a cultural tug-of-war over surveillance psychology, and Ken is going to buy a light blue tree. Certificate #45509.

In which astronauts and cosmonauts smuggle sandwiches, golf clubs, harmonicas, collectibles, and ashes into orbit, and John wants to blow bubbles on the Moon. Certificate #54825.