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In this task, you are given a text of many news articles seperated by special token "|||||". Your task is to summarize them.

Last night's Sherlock series finale has drawn the lowest overnight UK ratings in the BBC One show's history. 
  
 Only 5.9m viewers watched The Final Problem on Sunday night, down from the 8.1 million who tuned in on New Year's Day for the series opener The Six Thatchers, which was the single most-watched programme of the festive period. ||||| Photo: Karen Brill 
  
 Is it possible that the instruments of the Russian government function with a one-for-them, one-for-me operating system? As in, we’ll maybe interfere with an American election for you, so long as we can get the people’s paws on the new episode of Sherlock? After a Russian-language version of Sherlock’s recent season finale appeared online on Saturday, BBC Worldwide is looking into the possibility that the leak came from the broadcaster of the Russian state, Channel One. The station holds the rights to Sherlock in Russia, and the leaked episode featured a continuity announcement identifying it as having originated from Channel One, according to The Telegraph. Analysts are suggesting that the leak could have been a punitive strike against the British company in retaliation to two moves: a plan to expand the BBC World Service’s Russian-language output, and the closing of accounts linked to Russia’s English-language broadcaster that the Kremlin believes the BBC was behind. 
  
 The BBC is working with Channel One to nail down definitively the source of the leak. According to Deadline, Channel One released a statement about the investigation, announcing it “has been cooperating with BBC Worldwide from the moment we were alerted to the appearance of the leaked episode and we are doing everything in our power to determine the source of the breach. Initial investigations suggest our content system was compromised by an unauthorized external third party.” Somewhere, Sherlock Holmes stands on the sidelines, hand raised, teeming with deductions, waiting to be called on. ||||| The BBC is investigating how the fourth season finale of Sherlock was leaked online, after a Russian-language version of the episode was illegally uploaded ahead of transmission. 
  
 A leaked version of His Final Problem featured a short continuity announcement that identified it as broadcast by Russian state-owned Channel One. It appeared online on Saturday. 
  
 After the leaked episode started circulating online, the BBC tweeted: 
  
 We are aware that #Sherlock episode 3 has been uploaded illegally online. If you come across it, please do not share it. #KeepMeSpoilerFree — Sherlock (@Sherlock221B) January 14, 2017 
  
 The show's producer Sue Vertue confirmed the leak originated in Russia and appealed users not to share it: 
  
 Russian version of #Sherlock TFP has been illegally uploaded.Please don't share it. You've done so well keeping it spoiler free.Nearly there — sue vertue (@suevertue) January 14, 2017 
  
 The BBC later confirmed in a statement that it is conducting an investigation into the leak. 
  
 "BBC Worldwide takes breaches of our stringent content security protocols very seriously and we have initiated a full investigation into how this leak has occurred," it said. 
  
 Mashable understands that the British broadcaster is in contact with Channel One in Russia to understand what has happened. It will make a statement once the inquiries are concluded. 
  
 Many UK newspapers suggested the hack could have political motives. The Daily Telegraph reported claims that the Kremlin was angered by a recent decision to expand the BBC World Service's Russian language output. 
  
 In October, a spokeswoman for Russia's foreign ministry promised tit-for-tat retaliation against British media after NatWest attempted to close bank accounts linked to RT, Russia's English-language broadcaster. 
  
 “Our stance is straightforward: we will stick up for our own," Maria Zakharova said. "They [Britain] will get as good as they give." |||||
Output:
Russian authorities are suspected of doing something Sherlock's producers might consider as dastardly as meddling in the US election: leaking the hit BBC detective series' season finale online. A Russian-language version of the fourth season finale appeared on Saturday, a day before the BBC aired it, and evidence including a continuity announcement points to it being a leaked copy of the episode provided to state broadcaster Channel One, Vulture reports. "BBC Worldwide takes breaches of our stringent content security protocols very seriously and we have initiated a full investigation into how this leak has occurred," the British broadcaster said in a statement. It urged fans not to watch or share the leaked version. In the British press, there has been plenty of speculation that the leaking of the episode may have been Moscow's revenge for British moves, including the expansion of the BBC's Russian-language output, Mashable reports. The episode received the lowest ratings in Sherlock's history, though the sleuths at the Telegraph have uncovered evidence that the Russians may not be entirely to blame: Critics called it "shockingly bad," "an abject, flailing, noxious mess," and "self-indulgent rubbish."