Westworld season 2 episode 10 post-credits scene explained - and what William twist means for future of HBO show

*Major spoilers follow - you have been warned*

Ed Harris recently revealed in an interview he has no bloody clue what's happening in Westworld, and - in regards to hs character- audiences wi find themselves in the same boat following the season 2 finale.

The 90-minute bumper episode had enough revelations packed in to keep fans' patience abated until the third season rolls around in 2019, however it was the post-credits scene that truly dropped jaws.

Having barely featured in the finale despite being centre stage in last week's penultimate offering, William returned in a big way with a scene many will be theorising over for months to come. We see him exit the elevator we see him go down earlier in the episode, which brings him to the same place we last see the non-Charlotte Hale Dolores (Evan Rachel Wood and Bernard (Jeffrey Wright) in the park. They're nowhere to be seen. In fact, a lot of time has passed since that moment and he's met with a familiar face - his daughter, Emily (Katja Herbers).

Did William's journey down the elevator transport him into the future? No. We swiftly learn that the Man In Black, like James Delos, is in fact a replication of his human form. Emily takes him to a room, much like the one he questioned Delos in for decades, where she begins to ask him about his time in the park. She insinuates that they've played this scenario out many times before dropping the bomb shell - she#s testing his fidelity exactly like he did to hundreds of James Delos in the past.

This doesn't mean everything we#ve seen happen to William in season 2 isn't real - it certainly was. However, this cloned version of William has been repeating them over and over long into the future. Much like Delos' story always ended with him shunning his son Logan (Ben Barnes) who will go onto overdoes six months later, Williams ends with him gunning down his own daughter as he question the nature of his own reality.

What this means for William going into season 3 is quite unclear - Harris confirmed to HuffPost he'll be back - but it certainly raises some interesting questions, as well as provides a link back to Westworld for a season that looks set to be located in the real world that now has three hosts (Bernard and Dolwill take place back in the real world.