Gone again

As Mark Douglas photographs a pod of whales stranded in the waters off Edinburgh's Portobello Beach, he is called by his son's school: his wife, Lauren, hasn't turned up to collect their son. Calm at first, Mark collects Nathan and takes him home but as the hours slowly crawl by he increasingly starts to worry. With brilliantly controlled reveals, we learn some of the painful secrets of the couple's shared past, not least that it isn't the first time Lauren has disappeared.