Moffat and Gatiss were originally not going to put a confrontation between Moriarty and Sherlock into the first three episodes, but realised that they "just had to do a confrontation scene.
Moffat i Gatiss u početku nisu namjeravali uključiti suočavanje između Moriartyja i Sherlocka u ove 3 epizode, ali su shvatili da "jednostavno moraju napisati scenu suočavanja.