Here we go again then. The “first series”, as the BBC are calling it after the fact, of I Know Who You Are slammed the brakes on and juddered to a bewildering halt back in the middle of August. Almost everyone who’d sat through the plot dodgems of those 10 episodes will have had the same reaction: eh?

Forty years ago Whispering Bob Harris made a documentary about Queen. He eavesdropped on them as they recorded the album News of the World and then followed them around America on tour. The film was never broadcast but the footage was exhumed for this anniversary and stapled together in Queen: Rock the World (BBC Four), the latest in the BBC's prancing cavalcade of recent documentaries about the band (see sidebar).

There was much more to Brendan J Byrne’s engrossing, even-handed documentary 66 Days (BBC Four) than its title might at first suggest. The timeline that led up to the death on 5 May 1981 of the IRA prisoner provided its immediate context – an increasingly dramatic one as the countdown of Sands’s hunger strike nears its inexorable conclusion.

Now we know who sent Jonas Kaufmann the Union Jack boxer shorts for the Last Night of the Proms. Whether the sender’s identity is the bigger surprise, or the hint of ambiguity over whether the "Greatest Tenor in the World" had previously heard of one of Britain’s favourite baritones – well, you decide. And no, we don’t learn who threw the knickers at him from the arena.

Beware – here be spoilers, though if you can make them out through the blizzard of cliché that engulfed the last double-bill of this thunderingly underwhelming Nordic noir then you’re already ahead of me.

Magnum was founded just after the war in 1947 as a co-operative that ensured both the quality of its members, and their clout in dealing with the media world. Its longevity is testimony to its success. The original founders were war-hardened photo journalists and included Robert Capa and David “Chim” Seymour; the first woman member was Eve Arnold, who joined in 1951.

What would Saturday nights be without BBC Four’s regular subtitle-fests? Black Lake, their new Swedish import, has nothing in the way of originality to recommend it, but its tale of a haunted ski resort somewhere out towards the Norwegian border may help to ward off seasonal ennui as temperatures fall and the evenings draw in.   

The first thing to say is that this wasn’t the actual end. BBC Four scheduled I Know Who You Are to run two episodes a night over five Saturdays. The innocent punter might have assumed that after 10 x 70 minutes of the Spanish import, we’d arrive at some sort of terminus. With only a few minutes still to run, who wasn’t thinking, crikey, still quite a tick list of bows to tie up?

When you’re next strolling through Washington Square Park, or SoHo, or the West Village, you can thank Jane Jacobs that those New York neighbourhoods have survived (though she'd blanch at the price of real estate). Four-lane highways almost dissected and ruined them in the mid-Fifties, but her grass-roots activism saved those higgledy-piggledy streets.

Only man is vile, goes the hymn, and yet humankind has always imagined ideal societies where people care for one another, everyone has access to anything necessary physical and emotional well-being, and all is for the best – without irony – in the best of all possible worlds.