彼一时此一时

彼 = 彳 + 皮 : Brunhilde (bi) is doing experiments with living cultures in Petri dishes (彼) in the space station (Ø3). In one of her early cultures leather (皮) is growing, and in her most recent project she managed to have black sneakers (彳) grow in a Petri dish.

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.

时 = 寸 + 日 : Mnemonic symbol: a giant pocket watch.

The sun (日) asks Sherlock Holmes (sh) out for a coffee in the space station's kitchen (Ø2). Looking at his pocket watch (时), Sherlock sees he has time, winks and "thumbs up" (寸).

此 = 匕 + 止 : These boots are made for walking! The King of Chu cannot get his boots off in the space station. First he tries with the help of a large ladle, then he switches to a big barrier, which finally works.