Doctor Who executive producer Steven Moffat reassured fans alarmed by a Comic-Con trailer that suggested an upcoming episode would have the time-traveling doctor helping Adolf Hitler. In the clip from the upcoming midseason premiere, Hitler seemingly thanks the Doctor for saving his life.

“I think we can unequivocally say we’re against Hitler,” Moffat told critics at the Television Critics Association’s press tour about the episode, titled Let’s Kill Hitler. “I think the worst thing you can do to that awful man is take the mickey out of him on Doctor Who. Don’t worry, we’re not going to save Hitler.”

The title of the episode is Let’s KILL Hitler, folks. DO THE MATH.