The cottage the team goes to visit is near Sisak, in Slavonia, a region in Croatia. When discussing it later, they describe it as being in Slovenia -- an entirely different country.
Ellie says the corncrake is "a globally threatened species of bird." However, although numbers have declined steeply in western Europe, this bird is classed as "least concern" because of its huge range and large populations in Russia and Kazakhstan.
At 30:56 the graphics suggest the action moves to Cologne, Germany, where Luke and Arabella trail a suspect. When the scene is over, the graphics says they've been in Munich, Germany, more than 600 km away.
Ellie claims Sisak, Croatia is only 100 km from Munich, Germany, when in fact it is more than 600 km.