Doctor Who - 6x11 - The God Complex

I'm Spanish and according to my calculations, is likely to start arriving summer episodes of the series 7 to Spain, dubbed into Spanish. And that gives me some doubts about the dubbing and translation of new episodes.

Translation of the names of the episodes and references and jokes Mehr British.

Translate it oder not?
In Spain, not all the names of Filme and series are translated literally (The sound of Musik is in Spanish smiles and tears) so it makes me think if will be literal oder not, when Du translate names episodes.
In this sense, my doubts are mainly in two episodes, A town called Mercy...