In which we study the human brain's terrifying capacity for adaptation, via upside-down cigarette lighting, weird-smelling houses, and "stoner" voice. Certificate #37104.

In which John explains why there are only 643 of the greatest guitar ever made, and Kirk Hammett of Metallica pays $2 million for a Fleetwood Mac hand-me-down. Certificate #30784.

In which Sumeria's shiftiest businessman keeps all his hate mail around for four thousand years, and Ken gets accused of counterfeiting by a local bookstore. Certificate #27107.

In which one of America's richest young men gets really into New Guinean tribal art, and ends up getting really into a New Guinean tribe. Certificate #7628.

In which a British newspaper mysteriously spends June 1944 printing top-secret World War II spoilers, and Ken fails to amuse John with a lengthy anagram about a sex scandal. Certificate #29294. 

In which John runs down the history of serial burglary, beginning with gentleman jewel thieves and ending with a plane crash in the Bahamas. Certificate #39409.

In which the Byzantines save their empire by inventing the flamethrower, John clears up a misconception re: how many roads go to Rome, and Ken clears up a misconception re: how many herbs and spices are in KFC. Certificate #10403.

In which John blames the boring skyline of Los Angeles on Regulation Number 10, an ill-conceived attempt at making every building in the city accessible by helicopter. Certificate #38095.

In which NASA gives aliens a weird gift basket (opera arias, a welcome from a Nazi war criminal, a lousy map, and absolutely no nipples!) and Ken gossips about wife-swapping astronomers. Certificate #34914.

In which a piano starts to fall right through the floor of a second-story dining room, and as a result, the White House gets a balcony, a bunker, and a bowling alley. Certificate #47967.