Wow. This sounds like a watch and a half. Documentary maker Cosima Spender has tackled a most personal and painful subject: her grandfather, the Abstract Expressionist painter, Arshile Gorky – whose complicated history (often a fabric of lies) and legacy have provided, she says, the ‘tangled, white noise of my life.’ It’s an awful story – everything bad happens – but Spender as a film maker has never been interested in wallowing in self pity, and the combination of her clear intelligence with such intimate access to Gorky’s widow and daughters (her grandmother, mother and aunt), will, we expect, make this an utterly compelling documentary. It’s on this Monday at 10pm on BBC 4, part of the BBC’s excellent Storyville series. For a taster, watch the trailer, below.