John Simm will be returning as the Master in Doctor Who‘s tenth season.

“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,” said Simm in a BBC press release.

Simm played the Doctor’s nemesis during David Tennant’s reign at the Time Lord and will join his female persona, Missy (Michelle Gomez), in the new series. And why not? The Doctor has run into his past selves throughout the programme’s long history, and two Masters will mean double trouble for Peter Capaldi’s Doctor – and double the fun for Whovians.

Doctor Who: Series 10 premieres on April 15.