Doctor Who's Steven Moffat knows what season 9 baddie he's most looking forward to, now it's time to see if you agree.

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The Zygons are back, rearing and ready to make their second New Who appearance, and Moffat recently announced episodes 7 and 8 will put the fleshy monsters "center stage."

"I really like what we've done with the Zygons," Moffat teased. "It is a terrific two-parter, a terrific story. I think, possibly, it's nailed, certainly better than any other season I've done, the midseason problem. What do you do when every one's jumping back in? I think we've got this cracking two-parter and a really good use of the Zygons."

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If the morphing aliens don't get you riled up for the Peter Harness penned episodes, the return of UNIT, Kate Stewart (Jemma Redgrave), and the deceased Osgood (Ingrid Oliver) should get your time traveling senses buzzing.

Jenna Coleman (Clara) has also spoken out about season 9 as a whole, calling the upcoming episodes "really provoking" and relevant to "some stuff kind of happening today, really interesting ... makes you think."

Find out more when Doctor Who returns to the BBC and BBC America this September. See a new trailer below.

Tags: Doctor Who television BBC