彼时

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.

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).