Too edgy and clever to be wasted on kids: Netflix’s Locke & Key reviewed

One of my perpetual gnawing terrors is that I’ll recommend a series that looks initially promising but turns out to be total rubbish, meaning I’ll for ever have thousands of viewers’ wasted lives and disappointment on my conscience. But my even greater fear is that I’ll peremptorily condemn something after one or two episodes which subsequently reveals itself to be a near-masterpiece.