MacRae previously wrote the two-part Series 2 story ‘Rise Of The Cybermen’ and ‘The Age Of Steel’ for David Tennant’s first series in 2006.

The magazine reveals that the episode will be directed by Nick Hurran (The Prisoner, Bonekickers), who is also directing Toby Whithouse’s Episode 11 (‘The God Complex’), guest starring David Walliams.

The magazine suggests that MacRae’s episode has already been shot. The two remaining episodes of Series 6 to be shot will be Episode 8 and Episode 13, both written by Steven Moffat.

Series 6 will begin on Saturday 23rd April.