The episode will be very special: it will take us into the world of the invisible. In fact, what our eyes can see is only part of the world around us. Just think for example of the infinitely small, where among other things surprising, sometimes monstrous beings live, even on our skin. Or just think of the infinitely large: at night the stars appear to us only as small bright dots, yet up there in the universe there are fantastic, extraordinary landscapes that our generation is able to admire for the first time.