The Zygons, a race of shapeshifting aliens, have been living in secret among us on Earth, unknown and unseen – until now! When Osgood is kidnapped by a rogue gang of Zygons, the Doctor, Clara and UNIT must scatter across the world in a bid to set her free. But will they reach her in time, and can they stop an uprising before it’s too late?

We’re halfway through Series 9 but, if tonight’s episode is anything to go by, the drama is only just getting started. The Zygons were back with a vengeance… and Osgood was, too!

First introduced in the 1975 Fourth Doctor serial Terror of the Zygons (see what they did there?), the malevolent monsters made their 21st century debut in the 50th anniversary special, The Day of the Doctor, which left all of us wondering how long it would take for them to show their faces again. Not very, as it turns out, as they returned to wreak more havoc for our heroes with UNIT caught right in the middle. To be honest, UNIT usually are.

The return of everybody’s favourite military organisation also marked the unexpected but anticipated comeback of Osgood, played by Ingrid Oliver, who was back to fight another day despite the fact she was mercilessly killed at the end of the last series. Classic Doctor Who. With twists, turns and a spectacular cliffhanger to boot, we just about survived The Zygon Invasion, so what did you think of the episode in question? Was it an enthralling escapade from start to end, or are you having trouble getting your head around its shape-shifting shenanigans? It’s Hallowe’en, but did Doctor Who deliver us a trick or a treat…?

Rate The Zygon Invasion

• Best. Zygon. Story. Ever. Loved it, and that cliffhanger was something else. Take a bow, Peter Harness!
• It was great to see UNIT, Kate and Osgood (especially Osgood) again, but the Zygons could've been so much more.
• An interesting premise and it's always good to see the Doctor up against an old foe. Where are the new monsters, though?!
• Oh, man. I was really hoping that the Zygons would reignite my enjoyment of this series. No such luck. Maybe next week...?

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NOTE: This discussion will NOT be spoiler monitored so please do not read the comments if you haven’t seen The Zygon Invasion. You have been warned!

Series 9 continues tonight and there’s a familiar foe coming to town as the Doctor and Clara prepare to face The Zygon Invasion.

Amidst the shape-shifting shenanigans, however, there’s also a great mystery afoot. The episode will also mark the return of UNIT, fronted, as ever, by Kate Stewart herself, who will also be joined by her amicable associate Osgood, which is where things get really interesting. That’s because it hasn’t even been a year since she was sensationally killed off by Missy, so how has she died and lived to tell the tale?

There are a manner of explanations, of course, but we’ll probably all be proven wrong. The Seventh Doctor-esque question marks on her lapel are apt, though, as her unexpected yet anticipated comeback has been one of the biggest surprises of the year. But whatever did happen to Osgood? Share your last minute theories by voting and commenting below! The answers – and probably more questions – will be revealed tonight at 8:15pm on BBC One.

Whatever happened to Osgood?

• Isn't it obvious? Osgood is really dead (boo!) and this is her Zygon clone from The Day of the Doctor. Simples!
• Osgood didn't really die in Series 8 and she's been in cahoots with Missy ever since.
• The Zygon Invasion takes place before The Day of the Doctor so Osgood hasn't died yet. The Doctor knows her future, though...
• None of the above. The explanation was shock us all, and I can't wait to find out!

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“What took you so long, old man?” Click here to discuss The Woman Who Lived…

It’s out with the new and in with the old next week as we bid farewell to Ashildr (but for how long?) to welcome back one of the most iconic foes in Doctor Who history.

The Zygons will be back with an almighty vengeance as Series 9 continues but their shape-shifting shenanigans won’t be the only cause for confusion. Osgood, who was killed off in Series 8, is also back, but who can be trusted?

The Zygon Invasion airs on BBC One on Saturday 31st October at the slightly earlier time of 8:15pm.

“What took you so long, old man?” Click here to discuss The Woman Who Lived…

The latest Doctor Who Magazine goes on sale later this week and the cover features a familiar face as the issue looks ahead to her return in the new series.

Osgood will be reunited with the Doctor in Episodes 7 and 8 of Series 9, a Zygon two-parter written by Peter Harness, and her involvement is particularly intriguing because the character was controversially killed off by Missy at the end of the last series. Anything can happen in Doctor Who, of course, and her real life alter ego Ingrid Oliver has spilled the beans about what fans can expect from her third comeback.

Also inside, the show’s resident special effects genius Danny Hargreaves reveals the tricks of the trade plus there’s all the latest news, reviews, interviews, competitions and more…

Doctor Who Magazine Issue #488 is published this Thursday (25th June), priced at £4.99.

Browse the latest Doctor Who products on sale now in our merchandise section…

Rebecca Front has been confirmed as the latest guest star for Series 9.

The actress, who has previously shared the screen with Peter Capaldi in The Thick of It, will be reunited with her former co-star in Episodes 7 and 8, the Zygon two-parter by Peter Harness, which is currently being filmed in Cardiff.

Jemma Redgrave and Ingrid Oliver will also be returning in the two-parter, which features one of the show’s “biggest” cliffhangers to date.

The Doctor will return in The Magician’s Apprentice – click HERE for all the latest!

Peter Harness has revealed that fans can look forward to a big cliffhanger during his upcoming Doctor Who two-parter.

It’s been confirmed that the Kill the Moon writer has put pen to paper for a double adventure which will be broadcast as Episodes 7 and 8 of Series 9. The episodes will mark the return of Osgood and the Zygons which Peter admitted is “a privilege”, albeit one that is ”a bit unbelievable”. “I think it’s quite an exciting story,” he told Digital Spy. “Unfortunately, I’ve got two fan favourites in my hands now, which can only set me up to disappoint people!”

He continued: “But it’s nice to do a cliffhanger, and I tried to write the biggest one I could.”

Filming for Series 9 is currently underway. It’s scheduled to air on BBC One in the autumn.

Osgood and the Zygons will be returning to Doctor Who, it has been confirmed today.

Ingrid Oliver will be reprising her role as the popular UNIT scientist, who was killed by Missy during the Series 8 finale, in Episodes 7 and 8 of the new series. Steven Moffat has teased that “anything can happen” as she’ll be back alongside the Zygons who were last seen in The Day of the Doctor, during which Osgood was cloned by the shape-shifting monsters. The two-parter, written by Peter Harness and directed by Daniel Nettheim, will also feature Kate Stewart.

“Osgood is back, fresh from her recent murder,” Steven teased. “We told you Osgood was dead, but she’s back in action. This time though, can the Doctor trust his number one fan?”

Ingrid added: “There is always that secret hope you’ll get the call asking you to come back, so to receive that call is unexpected but brilliant. I was so sure that Osgood was a gonner!”

Other guest stars for the episodes include Jaye Griffiths, Cleopatra Dickens, Sasha Dickens, Abhishek Singh, Todd Kramer, Jill Winternitz, Nicholas Asbury, Jack Parker and Aidan Cook.

Are you excited to see Osgood and the Zygons again? Let us know in the comments below!

Filming for Series 9 is currently underway. It’s scheduled to air on BBC One in the autumn.

The BBC has confirmed that Kate Stewart will be returning to Doctor Who for Episodes 7 and 8 of Series 9.

Jemma Redgrave will once again be reprising her role as the Brigadiers’ daughter, and UNIT’s Chief Scientific Officer, who was first introduced in The Power of Three before appearing in The Day of the Doctor and last year’s Series 8 finale. She’ll also be guest starring in the two-part opener The Magician’s Apprentice and The Witch’s Familiar.

The actress said she is both “happy and thrilled” to be back.

Kate Stewart will also be helming her own Big Finish spin off, set to launch later this year.

Filming for Series 9 is currently underway. It’s scheduled to air on BBC One in the autumn.