AThe QI logo.The Gospel of John, chapter 14.Binary codeA description of scleroproteinsA page from the Oxford English Dictionary, open around "pragmatism"A text in alchemical symbolsA chemical text in FrenchSome writing about physicsA DNA code (although the bases are grouped in fours, fives and sixes, whereas they should be grouped in threes)Some mathematical equationsAnother text made of symbolsA chemical text in GermanSeveral images: a Mandelbrot fractal, flowers, bananas, a space shuttle, a Friesian cow, a British red telephone box, Leonardo da Vinci's "helicopter", a tiger, a young boy, an Ancient Greek painting, Christ the Redeemer, the periodic table, a great white shark, the world (the magnifying glass then shows Sardinia), Barrister Mohandas Karamchand Gandhi, ivy, the Statue of Liberty, a frog (with Devanagari script over it), a pigeon (part of a telephone book over it), a clockface, a baby, Saint Basil's Cathedral, an island with a coral atoll, William Shakespeare.
AYes, on the K Series episode, "Kinetic". The question was "What is the largest animal on Earth?" and Alan did not answer. He was very frustrated afterward. And in one of the F episodes in season 6 ("France"), Fry asked Alan a question in french to which the correct answer was Blue Whale, but because it was in french, Alan didn't understand it.