二疊紀

二 = 一 : Mnemonic symbol: a capacitor, because the two strokes remind me of the symbol in electrical drawings. Albert Einstein (Ø) is experimenting with a capacitor (二) in the space station's bathroom (Ø4). He finds that it's uncomfortable to discharge a capacitor using two flutes (一).

叠 = 冝 + 叒 : Dorothy Gale (di) finds the shelves (冝) in the elevator's kitchen (e2) are a complete mess. First she completely empties the shelves, piling up a heap of boxing gloves (叒) and another heap of cooking tops (冝). Then she proceeds to neatly layer (叠) the boxing gloves and cooking tops back into the shelves.

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.