In May 2013, a call to Thames Valley Police set alarm bells ringing. A little girl called Sarah Dahane had gone missing in the small Oxfordshire town of Bicester. Angela Whitworth, Sarah’s mother, wanted to return to Africa with her daughter, but Nabil, Sarah’s father, didn’t want that to happen – and the court agreed. With the decision final, Nabil Dahane went to pick up his daughter for another visit, but Angela and Sarah didn’t arrive. Police went to Whitworth’s house, where they found Sarah’s body. She had been murdered by her mother. The race was on to find Angela Whitworth, but she was already on a plane to Nairobi. Would the authorities be able to trace her in Africa? Two teams are out early on the hunt for foreign criminals in London. DS Dean Coyle and his team are looking for a Romanian robber in West London, who has got a three-year prison sentence still to serve. Will the slippery fugitive cycle his way out of their grasp? Meanwhile, DS Pete Rance is in Hackney, hoping his research will lead him to a man accused of a very serious and violent crime. Abel Rostas fled Romania after being accused of attempted murder three years ago. A check of his ID reveals the arrest is the last 21st birthday present Rostas could hope for. And for criminals, Spain is a lot more than a holiday destination. It is a gateway into Europe for those who control the smuggling routes, and a bolt hole for those wanting to lie low. Hunting them down is an elite part of Spain’s Guardia Civil known as the 'Fugitives Unit’. It was set up to take on some of the most dangerous organised crime groups in the world, as well as British criminals looking for a safe haven abroad.