Doctor Who seems to be the master (no pun intended) at creating paradoxes and writing around them beautifully so we don’t overwork our suspension of disbelief. We saw this in the amazing 50th anniversary episode “The Day of the Doctor” when John Hurt, David Tennant, and Matt Smith co-starred as the same character just in different incarnations.

Well, they’re doing it again! But this time, we don’t have the benefit of 3 Doctors to help save the world. We have the added challenge of 2 Masters at once. That’s right. John Simm is returning as The Master, but we still have to deal with Missy, too!

John Simm says: “I can confirm that it’s true, thanks to the power of time travel I’m back. It’s always a pleasure to work with this great team of people and I can’t wait for you all to see what the Master gets up to in the next series. “

Steven Moffat, writer and executive producer, says: “Nothing stays secret for long on Doctor Who but you’ll have to wait a little bit longer to see exactly what the Master is up to and how he makes his return to face the Doctor. It’s been a huge pleasure to have fan favourites John Simm and Michelle Gomez face to face in the same role! It’s not often you get to see a solo personality clash.”

Doctor Who series 10 will see the return of Michelle Gomez as Missy (a later regeneration of the Master) the Daleks, the Ice Warriors and – returning for the first time in over 50 years – the Mondasian Cybermen (can’t wait to see how they explain that one).

An exciting line up of new faces and adversaries will debut across the series, including adorable-but-deadly Emojibots and David Suchet as the Landlord.

Doctor Who returns to BBC One with episode one The Pilot on April 15th!