世纪末

世 = 廿 + L : Mnemonic symbol: the WTO or WHO.

Sherlock Holmes (sh) is cleaning a flower pot (廿) under the shower of the space station's bathroom (Ø4) with a loofah (L) because he didn't quite understand a poster next to the shower from the WHO (世) explaining dangers arising from different germs.

In this case, L is for loofah.

纪 = 己 + 纟 : Joan of Arc finds the space station's bathroom full of silken threads. She even cannot accomplish much using a butcher's hook. She knows that the silk worms are responsible and thinks that soon it will be the era of the silk worms.

末 = 一 + 木 : Mnemonic symbol: a Jehovah’s Witness, because they think the end (末) is near.

Mahatma Gandhi (m) set up a giant flute (一) on a Christmas tree (木), trying to raise awareness for the Roof of the World in the observatory's bathroom (o4). He chose the flute and the tree as symbols for the sky and nature, but as Jehovah’s Witness (末) enters, she thinks it's the sky that has fallen down on our heads, and the end (末) of days is ultimately here.