坐視不理

坐 = 从 + 土 : Zapatista Zebra (zu) sits (坐) next to a rubber chicken (从) on a clay (土) bench (mnemonic symbol for 坐) in the observatory's bathroom (o4).

视 = 礻 + 见 : Sherlock Holmes prepared a trap in the space station's bathroom. He knows that the murderer will pass by there and set up a lot of surveillance cameras to film him. Additionally he lingers around disguised as a monk in a monk's cowl to look at and observe him personally.

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.

理 = 王 + 里 : Li Qingzhao (li) and Martin Luther King (王) have the mission to find out the intrinsic order (理) and inner essence (理) of sunflowers (里) in the space station (Ø3). They grow a few sunflowers and care for them very meticulously, talking to them and everything.