The memo, which the brand has since admitted was a stunt, instructed staff to familiarise themselves with the storyline in case customers wanted to purchase items such as rope, cable ties and duct tape.
The memo was leaked to the media, reporting that it had been sent to all 20,887 staff around all 359 UK stores.
In 48 hours the stunt received more than 75 pieces of coverage with in publications including The Daily Telegraph, Mail Online, BBC Radio Two, Sky News and a cartoon by Mac in the Daily Mail.
Since confessing the hoax, the brand has generated further coverage as publications cover the story for the third or fourth time.
Matthew Moore, news editor at The Independent, said the PRs behind the campaign were "winning":
The PRs are winning... http://t.co/MQKQX1ri7f— Matthew Moore (@mattkmoore) February 11, 2015