BBC America‘s clone drama returned Saturday night with its best-ever A18-49 rating and now is the network’s second-highest-rated series in the demo, behind only Doctor Who. Orphan Black was the No. 1 television show on Twitter and Tumblr for the day and is the No. 1 basic cable drama on Twitter for the week.

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Orphan Black recorded a total of 785,000 across multiple plays — premiering with 620,000 total viewers and 391,000 demo viewers. On Saturday, the series reached a new high on Twitter, reaching 1.2 million unique users with more than 43,000 tweets about the show. This is up 185% from the previous best (Season 1 finale) and nearly six times greater than the series premiere. The premiere episode alone generated nearly 36,000 tweets, beating several high-profile premieres this season including Fargo, Homeland, True Detective, Vikings, The Americans, Turn and Arrow. On Tumblr, there were 1.8 million notes on posts about Orphan Black in the month leading up to the premiere, including 277,000 on Saturday.

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From co-creators Graeme Manson and John Fawcett, Orphan Black opened its new season with Sarah (Tatiana Maslany) in a desperate race to find her missing daughter Kira (Skyler Wexler), which puts her head-to-head with ruthless pro-clone, Rachel (Maslany). This season also rejoins Sarah’s clone sisters Alison (Maslany) and Cosima (Maslany) as they struggle to keep their clone world a secret while dealing with the harsh reality that no one around them can be trusted.