It's time to raise the dead on Doctor Who.

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Osgood (Ingrid Oliver) is back for season 9, although her reappearance won't discount her "Death in Heaven" demise. Instead, the UNIT scientist will go a second round with the Zygons in a time travel twist.

"Osgood is back, fresh from her recent murder at the end of last series," showrunner Steven Moffat said. "We recently confirmed that Osgood was definitely dead and not returning - but in a show about time travel, anything can happen. The brilliant Ingrid Oliver is back in action. This time though, can the Doctor trust his number one fan?"

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Appearing alongside Kate Stewart (Jemma Redgrave), UNIT's Chief Scientific Officer, Osgood will star I episode 7 and 8. The untitled installments will be penned by Peter Harness and directed by Daniel Nettheim.

Previously announced episodes for season 9 are as follows:

Episode 1: "The Magician's Apprentice"

Episode 2: "The Witch's Familiar"

Episode 5: "The Girl Who Died"

Episode 6: "The Woman Who Lived"

Find out more when Doctor Who returns to the BBC and BBC America this fall. Click the video below to see Osgood in action.