The episode discussed the dangers of moshing at concerts.

The episode was about astrology, and also discussed confirmation bias.

This episode discusses the possibility of life on other planets, especially Mars.

Each episode concerned a particular letter of the alphabet and discussed various subjects beginning with that letter.

These episodes discuss season two of The Walking Dead.

This episode discusses the phenomenon that new Latino immigrants, though often poor, generally have better health than the average American.

This episode also discusses highly energetic objects, gamma-ray bursts and hypernovae.

This episode discusses everything that viewers want to know about orgasms.

Other episodes discuss topics such as eminent domain, urban traffic congestion, and medical marijuana.

The episode discusses destiny, and leads the action to its tragic end, even something close to the coir (apostrophes).