The Detroit electro-techno duo of James Stinson and Gerald Donald aka Drexciya never gave away their secrets easily. Almost completely anonymous and never photographed during their 10-year existence – which ended with Stinson's 2002 death after a long illness – they surrounded their music with a complex mythos and mischievous wit comprehensible only to a small, obsessive cult audience. Only now are they getting wider appreciation, with a new generation of electronic musicians like Rustie hugely influenced by their sparse electronic funk, and the art world being introduced to their conceptualism via the work of the Turner Prize nominated Otolith Group.

After writing about a recent survey of French artist Philippe Parreno at the Serpentine Gallery last year, I found myself wondering about his collaboration with the Scottish artist Douglas Gordon. In 2006 the two artists made the acclaimed film Zidane: A 21st Century Portrait, and while Parreno’s skills as a film-maker were pretty evident from that first UK solo exhibition, Gordon’s talents must surely lie elsewhere - that is, outside the frame. Neither technically ambitious nor visually seductive, his films are not even meant to be seen in their entirety, certainly not his 1993 24-hour Psycho, which is simply a frame-by-frame re-presentation of the Hitchcock classic.

Fairy tales are fear tales really, the sweetening (and sharpening) of every child’s worst nightmares, emotions long buried in adulthood but very easily tapped back into with good theatre productions. The Witch in Hansel and Gretel should be the queen of the team of the ogres who lurk in forests or homes waiting to kill children, along with lieutenants the Wolf in Red Riding Hood, Snow White’s wicked stepmother and Carabosse in The Sleeping Beauty.

The last time I saw Wolfgang Holzmair in concert (at last year’s Oxford Lieder Festival, delivering one of the finest live performances of Winterreise I have heard) the silence that followed the cycle lasted almost 30 seconds – an absolute age where a fidgety post-concert audience is concerned. Last night’s programme of Schumann saw Holzmair finish and pause, hands raised prayerfully, holding his listeners’ attention like so many butterflies within his cupped palms. The release that followed was ecstatic, a spontaneous homage to the musical and narrative mastery of this extraordinary singer.

They have period names in the foreign country we call the past. In last night’s documentary about a brilliant wartime trick practised upon Hitler, we came across a coroner called Sir Bentley Purchase, a love interest called Peternel Hankins and a Welsh tramp with the stirringly patriotic if implausible name of Glyndwr Michael. Charles Cholmondeley, one of the authors of the deception, would even draw attention to the absurd discrepancy between the way his name looked and sounded. More or less the only person in this entire story who didn't sound like a character in a novel was Major Bill Martin, and yet he was entirely fictional. How on earth did the Nazis not smell a rat?

There is probably only one thing that Ann Widdecombe and I have ever agreed upon: we both think it might be a really good idea to stick William Wilberforce on the Fourth Plinth. Why not? It’s nice to have contemporary art in Trafalgar Square, of course, but surely there are few other reforming characters as worthy as the great abolitionist? And Wilberforce was many other things besides – though not all of them would necessarily impress the nation to quite the same degree.

When Riccardo Chailly (b 1953) left the Royal Concertgebouw for the Leipzig Gewandhaus, Richard Morrison said it was as if Bill Gates had ditched Microsoft for Aeroflot. The Gewandhaus has since become one of the lustiest of orchestral beasts in the world. Chailly and his orchestra make a rare appearance at the Barbican next Thursday and like all his previous visits it's likely to be a pretty unmissable event.

Iphigenia is an abandoned child, almost murdered by her father, lost in bewilderment, captured and indoctrinated in an artificial existence. It hardly matters that her father was the legendary Greek hero Agamemnon, her mother the notorious Clytemnestra.