只知其一，不知其二

只 = 八 + 口 : Mnemonic symbol: this character looks like something (a head?) on two legs. I'll just represent it by a cuttlefish (只). James II of England (zh) has been in the space station (Ø3) as the only (只) one for too long and went mad. He thinks he's holding a mandarin (口), but he's just about to bite into merely (只) an eight ball (八). On the top of his head is a cuttlefish (只) he mistook for a hat.

知 = 口 + 矢 : Mnemonic symbol: Francis Bacon is attributed to have stated "scientia potentia est", "knowledge is power". I'll thus represent 知 by Francis Bacon. Francis Bacon (知) and James II of England (zh) are playing darts (矢) in front of the space station (Ø1). Because they lack a dart board they just use a mandarin (口).

其 = 目 + 八 : Looks like a watchtower. The Queen of Hearts is on lookout on the watchtower just inside the space station's entrance. The Eye of Providence helps her to look out for intruders. They also spread some eight balls for possible intruders to trip on.

Maud Younger (y) forgot her keys to the space station (Ø1), all she brought outside was her flute (一). She has no choice but to crash the door with the giant flute.

不 = 丆 + 卜 : Bruno Bear (bu) is setting up a wind wheel (丆) with a voodoo staff (卜) in the space station's bathroom (Ø4). He also puts a "forbidden" sign (mnemonic symbol for 不) on it, to make clear that it may not (不) be stopped.

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).