Viewers are now finally able to understand the ending of the Wish World episode. According to the Radio Times, the Rani created the Wish World with the help of Conrad and the god Desiderium, so the Doctor, played by Ncuti Gatwa, could crush it's reality using the power behind his doubts.

And in turn, this would then allow the Rani to see Omega, the BBC sci-fi show's classic villain.

As the episode drew to a close, the Rani is seen disassembling the Wish World's London, sending the Doctor descending off the edge of the universe.

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Throughout the show's history, viewers were led to believe that the Rani and the Doctor were enemies but it looks as though there is an additional dimension to their fraught relationship.

In the episode the Rani informs the Doctor: "People said we were lovers – can you remember if that’s true? Far away in time and space… were we?"

She added: "The tragedy is, we were never enemies – every villain you’ve ever fought wanted death, I only wanted life, remember?"

As is falling from the edge of the universe, he desperately attempts to reason with the Rani, telling her that he is a father to Poppy. He insists that she is real and adds: "Don't you know what that means?"

Fans of the popular sci-fi drama believe that the Rani created Poppy by using the Doctor's DNA and that of a human to create a human and Time Lord hybrid.

Speaking about the final episode of the series, showrunner Russell T Davies teased fans with what to expect during his interview with Doctor Who Magazine.

He said: "There are big surprises, from the Doctor and for the Doctor. Some of it shakes up the lore of Gallifrey. Some of it recontextualizes the Doctor, the Rani, and their relationship."

It has also been suggested that Poppy is Susan's mother.

The theory, according to the Radio Times, was brought about from The Devils Chord episode from the previous season.

In that episode, the Doctor reportedly mentioned Susan but claimed that he didn't have children at the time but used the word "yet"..

The publication has now posed the question that Susan is Poppy's child from the future and was then sent back in time.

Doctor Who continues tonight Saturday 24 at 18.50pm on BBC One