In this episode, Mrs Corbett tries to teach her husband about Plant Hormones, and he tries to think up a joke about plant hormones.

In this episode, Mrs Corbett celebrates the lifting of the hose pipe ban as she tries to teach her husband about Water Regulation.

In this episode, Mrs Corbett interrupts husband bleeding the radiators as she tries to teach him about Thermo Regulation.

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Of the tiger...Of the storm...Of the needle, none of these are discussed in this episode as Mrs Corbett tries to teach her husband about the eye of...the human.

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In this episode, Mrs Corbet tries to teach her husband about the brain, but first he must try to locate his own.

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In this episode, Mrs Corbett tries to teach her husband not how to plant the fences, but about defences that plant have.

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In this episode Mrs Corbett tries to teach her husband not how to plant diseases, but about diseases that plants get.

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In this episode, Mrs Corbett tries to teach her husband how to use the things that he only just learned how to pronounce.

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In this episode, Mrs Corbett tries to teach her husband how to pronounce 'monoclonal' plus some other very sciencey stuff.

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In this episode, Mrs Corbett tries to teach her husband how to stop making jokes about culture