[spoilers] Re-using Minor Actors

[Tea Lady]

I remember watching the commentary for episodes 4.09 a couple of weeks ago and this topic was actually mentioned, more specifically though in respect of stunt persons/actors. The government officer that was shot through the door at the start of episode 4.09 had actually also been used twice in season 5. He was killed again in season 5 and then beat up in another episode. With regards to the actors that are allowed to perform stunts, the commentary says there are only about 50 or 60 names on the stunt register in the UK, which isn't that many, so they have no choice to reuse actors.

I wonder whether this may be a similar case if you want an actor that can speak/looks Greek or Arabic for example, that the register of names is not that large, so at some point you will have to reuse them.