After waiting more than two years, fans finally saw the return of Idris Elba as DCI John Luther.
The end of season 3 left us hanging on the edge of our seats, but if you thought that everything would be explained right away, you were in for a shock.
After a depressing opening in which he received some shocking news, fans were glad to see Luther back to his usual wise-cracking self.
https://twitter.com/knowingkimberly/status/676877513772126208
The news of Alice's death was shocking, but surely they can't get rid of Luther's best pal that easily?
https://twitter.com/internet_cute/status/676877152189587461
Many were more interested in whether or not Luther had time-travelled to the pre-smartphone era...
https://twitter.com/BritishSubcult/status/676870599063531520
Game of Thrones fans were happy to see a new character with a familiar face...
https://twitter.com/BBCOne/status/676880694870564865
But Luther's techniques still left a lot to be desired for some...
https://twitter.com/sazza_jay/status/676880701602574338
https://twitter.com/ClaudiaBoleyn/status/676882104408539140
As ever, the BBC drama was full of its scary moments...
https://twitter.com/jchenrytweets/status/676882707348111360
https://twitter.com/CharlotteBHC/status/676879211869638656
But fans lost their minds at the sight of Sherlock Holmes and John Watson at the end...only to realise that it was just an advert for BBC drama...
https://twitter.com/ANDREW0675/status/676885325285883904
https://twitter.com/Abimarvel/status/676885488733696000
https://twitter.com/EveChadha/status/676885183392555008
https://twitter.com/Aimee0reilly/status/676884807700373504
