The BBC is investigating whether or not Russia leaked the season finale of "Sherlock" on purpose.
A Russian-language version of the episode "The Final Problem" appeared online Saturday, a day before the BBC was set to air the British version, The Independent reports.
That leaked episode featured an announcement linking it to Russia's Channel One, a state-run broadcast. A BBC source reportedly said the leak was "more than an accident."
We are doing everything in our power to determine the source of the breach.
"BBC Worldwide takes breaches or our stringent content security protocols very seriously and we have initiated a full investigation into how this leak occurred," a spokesman said.
Channel One said it was a victim of hacking by "an unauthorized external third party" and it was cooperating with the BBC investigation.
This, naturally, made a lot of people very upset.
Even the Russian Embassy in London addressed the controversy.
List of the most important things Russia have hacked:— charlie (@CharlieEKnowles) January 15, 2017
1. Sherlock ep
2. US election
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