The Traitors has set a record as the most-streamed entertainment show in the UK in the last two years.
The second series of the reality competition launched earlier this month with an overnight audience of 3.1m, but that figure has consolidated to 6.4m after seven days.
Episodes two and three have also grown to 6.1m, with views on iPlayer doubling the audience.
"The phenomenal growth of The Traitors on the BBC is testament to a fiendishly fresh format with the amazing Claudia Winkleman as our insightful and witty guide alongside the players masterful gameplay, all together making series two unmissable viewing," said Kalpna Patel-Knight, head of entertainment commissioning at the BBC.
"The Traitors demonstrates the success of the BBC's on demand iPlayer strategy. Launching and then growing a new Entertainment series in such a competitive market is no mean feat and with a gobsmacking final on the horizon, The Traitors is deservedly one of the hottest and most talked about programmes around."
Mike Cotton, creative director at producers Studio Lambert, added: "After the runaway success of The Traitors last year, launching a second series was always going to be a daunting challenge.
"The team were united in their ambition to elevate the existing game, whilst also creating more surprising (and sometimes murderous) twists and turns for the audience.
"Claudia has once again been the most perfect host and the cast were simply brilliant, so we're absolutely delighted that viewers have loved watching the series as much as we enjoyed making it."
The Traitors concludes tomorrow and Friday at 9pm on BBC One and iPlayer.
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