Sherlock Holmes (sh) is cleaning a flower pot (廿) under the shower of the space station's bathroom (Ø4) with a loofah (L) because he didn't quite understand a poster next to the shower from the WHO (世) explaining dangers arising from different germs.
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Joan of Arc wants to leave this world and sets up a rocket launch field in the elevator's bathroom. The field looks like a normal crop field, except that there's a rocket in the middle and that the Joan of Arc marked the boundary with white and red tape.
the Three Worlds (as proposed by Mao Zedong), i.e. the superpowers (USA and USSR), other wealthy countries (UK, France, Japan etc), and the developing countries of Asia, Africa and Latin America