(though, it should be said, this news has already been hinted at previously).
In the past few days, filming has been taking place in a cemetery and spotted on set were Matt Smith, Karen Gillan, Arthur Darvill and Alex Kingston, reprising her role as River Song. Night shoots over the weekend have also confirmed the appearance of the actress as Cardiff doubles up for New York City. Actor Mike McShane, known for Whose Line Is It Anyway? and Robin Hood: Prince of Thieves, revealed that he is involved in this episode too, through Twitter.