Yep, it's true - after six years of bold, divisive storytelling and timey-wimey madness, Steven Moffat is stepping down as Doctor Who showrunner.

His replacement? Chris Chibnall, who will take the reigns in 2018 - following Moffat's farewell tour next year.

But just who is Chibnall? Here's what you need to know about the man who's just been handed the keys to all of time and space.

1. Chibnall is a long-time Doctor Who fan - and was once a member of fan club the Doctor Who Appreciation Society.

2. In 1986, he appeared on the BBC discussion programme Open Air to discuss concerns about the show's perceived dip in quality at that time.

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3. After early success in theatre, Chibnall's first major television venture was the light-hearted hospital drama Born and Bred, starring James Bolam and Michael French. He served as head writer and producer for the show's entire run, from 2002 to 2005.

4. Chibnall wrote for both series of offbeat time-travel cop show Life On Mars - the only writer other than the show's creators, Matthew Graham and Ashley Pharoah, to do so.

5. In the wake of the revived Doctor Who's success, Chibnall was involved in the early stages of developing fantasy series Merlin for BBC One - though he departed the project before it made it to air.

6. In 2005, Chibnall became the head writer and co-producer of Doctor Who's adult spinoff Torchwood - under his guidance, the show broke BBC Three ratings records and was named Best Drama Series at the 2007 BAFTA Cymru Awards.

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7. Chibnall was appointed showrunner of ITV's Law & Order: UK in 2007, but opted to leave the show after one year. The crime drama would run for eight series in total.

8. Another 'one and done' for Chibnall was Camelot, a racy retelling of the Arthurian legend for US network Starz. It was axed after 10 episodes, though Chibnall had already planned to exit ahead of the second season.

9. In 2011, Chibnall wrote United - a drama based on the true story of Manchester United's "Busby Babes" and the aftermath of the 1958 Munich air disaster. It earned strong reviews from critics.

10. But his biggest TV hit to date came in 2013, when Chibnall launched the seaside murder mystery Broadchurch. The whodunnit - starring Doctor Who's David Tennant - took the nation by storm, though its second series last year received a more lukewarm reception.

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11. So how about his Doctor Who previous? Chibnall has written five episodes between 2007 and 2012 - the David Tennant space thriller '42', Silurian two-parter 'The Hungry Earth' / 'Cold Blood' for Matt Smith's first series in 2010, and two more for the show's seventh series - the self-explanatory 'Dinosaurs on a Spaceship' and Kate Stewart's debut 'The Power of Three'.

12. On his anointment as the third Doctor Who showrunner since its comeback in 2005, Chibnall said: "It's a privilege and a joy to be the next curator of this funny, scary and emotional family drama. I've loved Doctor Who since I was four years old, and I'm relishing the thought of working with the exceptional team at BBC Wales to create new characters, creatures and worlds for the Doctor to explore."

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