3x12 The Sound of Drums

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 আরো British.

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