The World's End Murders is the colloquial name given to the murder of two girls, Christine Eadie, 17, and Helen Scott, 17, in Edinburgh, in October 1977. The case is so named because both victims were last seen alive leaving The World's End pub in Edinburgh's Old Town. The only person to stand trial accused of the murders, Angus Robertson Sinclair, was acquitted in 2007 in controversial circumstances. Following the amendment of the law of double jeopardy, which would have prevented his retrial, Sinclair was retried in October 2014 and convicted of both murders on 14 November 2014. He was sentenced to life imprisonment with a minimum term of 37 years, the longest sentence by a Scottish court, meaning he would have been 106 years old when he was eligible for a potential release on parole. He died at HM Prison Glenochil aged 73 on 11 March 2019. Coincidentally, he died on the same day the BBC's Crimewatch Roadshow programme profiled the murders.

The Royal Mile is a succession of streets forming the main thoroughfare of the Old Town of the city of Edinburgh in Scotland. The term was first used descriptively in W. M. Gilbert's Edinburgh in the Nineteenth Century (1901), describing the city "with its Castle and Palace and the royal mile between", and was further popularised as the title of a guidebook by R. T. Skinner published in 1920, "The Royal Mile (Edinburgh) Castle to Holyrood(house)".