不速之客

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.

速 = 束 + 辶 : Susan Saint Bernard tries out a new way of moving much faster in the space station's bathroom. She attached a bundle of firewood to each of her legs, and attached gladiator sandals to the ends of the bundles. This way she extends her legs and increases her speed dramatically.

之 = 丶 + Z : Mnemonic symbol: Sooo sleepy... "zZz" (the character looks like a "Z"). James II of England (zh) fell asleep in front of the space station (Ø1). He sleeps on a big petal leaf (丶), making loud "zZz" (之) sounds.

客 = 各 + 宀 : Karl Marx (k) is receiving a visitor in the elevator's bathroom (e4). His guest is wearing a graduation cap (宀) and a dress made of stars (各).