BBC Scotland Investigates

The families of some of the victims of the Glasgow bin lorry tragedy break their silence and tell Jackie Bird about the devastating impact of the crash which killed six people and left more than a dozen injured. The families explain how they feel the investigation into the crash has failed them, and lay damning accusations at those in charge of the Scottish justice system. They also ask how a driver who lied about his past was able to slip unnoticed through multiple layers of bureaucracy allowing him to be in the driving seat of a 26-tonne bin lorry in December 2014.

BBC Scotland investigates the multimillion pound world of the dog trade. A third of all dogs bought today are believed to have come from puppy farms. Using secret filming, reporter Sam Poling follows the supply chain, from the small-time illegal sellers to the profit-driven puppy farmers getting rich off this ruthless trade. She exposes Scotland's biggest dog trafficker and uncovers a breeding facility operating on a scale the experts didn't believe existed in the UK - until now.

Scotland has a decision to make: to frack, or not to frack. The controversial technique could be used to release gas and oil from the shale rock which lies beneath central Scotland. Large energy companies are keen to do this, and say it is important for both our economic growth, and energy supply needs. But fracking has a bad reputation. Its opponents believe it is dangerous, with the potential to cause pollution and even earthquakes. The Scottish Government has announced a temporary ban, but for some that is just not enough. David Miller reports from the front line in the war over fracking, where the two sides are locked in a fierce battle for the hearts and minds of the nation. He sets out to find out whether shale gas extraction can be safe, and whether Scots can be convinced to give it the go ahead.

Fiona Walker meets some of the Scots struggling to get by on low pay. The programme investigates who is and who isn't paying the living wage. She hears evidence that many workers will never escape wages that mean they are trapped in working poverty. And the programme has an exclusive insight into research that tries to establish just what we need to have a decent standard of living.

Mark Daly investigates serious allegations of doping in athletics, spanning more than 30 years and involving some of the biggest stars in the sport. Since the explosion of steroid use in the 1970s, through the years when Lance Armstrong used EPO, the problem of sports doping refuses to go away, and drug testing regimes have struggled to catch the cheats. Daly goes on a journey investigating the world of doping, and in order to truly understand the world he's entering, the reporter becomes a doper himself.

They used to say that you weighed their vote rather than counted it, not anymore. Overwhelmingly rejected at the general election, leaderless and facing Holyrood elections next year - what went wrong with Scottish Labour? BBC Scotland Investigates speaks to former leaders, politicians and activists to examine how the party that was born here and helped shape the country came to have only one MP in Scotland.

Former Scotland Rugby International John Beattie investigates the links between the sport and brain injuries. As the Rugby World Cup kicks off he hears worries that the elite game is putting players at risk. He travels to the United States to look at scientific evidence that a rugby career can damage the brain in the long term. And the top doctors in the game explain what the sport is doing to tackle the problem.

BBC Scotland investigates the multi-million pound world of the legal high trade. Reporter Sam Poling tracks the supply chain of Britain's newest designer drugs, from their manufacture overseas to the devastation caused on the streets in the UK. Using secret filming, she exposes how those getting rich from this ruthless trade are evading the law. She meets the vigilantes who are confronting the legal high dealers head on with orders of exile, kneecappings and even killings. And she questions the UK government's ability to deal with the growing problem.