An enjoyable series which started brilliantly but has lost marks from me owing to its descent into melodrama and the use of clichéd villains.
The writers have also fallen into a common trap for UK series (e.g. "Poirot") of believing that smuggling was/is a police matter. It was not and is not. In the 1930s, 1940s and 1950s it would have been investigated by Customs & Excise, not the police. Now (2014) it would come under the remit of the Border Force and/or the NCA (depending on the scale of the crime).
Otherwise it is watchable but not in the same class as UK series such as "Sherlock", "Death in Paradise" and "Jonathan Creek".
The writers have also fallen into a common trap for UK series (e.g. "Poirot") of believing that smuggling was/is a police matter. It was not and is not. In the 1930s, 1940s and 1950s it would have been investigated by Customs & Excise, not the police. Now (2014) it would come under the remit of the Border Force and/or the NCA (depending on the scale of the crime).
Otherwise it is watchable but not in the same class as UK series such as "Sherlock", "Death in Paradise" and "Jonathan Creek".