Doctor Who: 10 Secrets Of The Sonic Screwdriver You Need To Know

The first time the Tenth Doctor met Martha Jones, he spent more time worrying about his broken screwdriver than he did about the wellbeing of her patients, which, to be honest, sums up their relationship quite nicely.

Ten fried his favourite toy after leaving it in an x-ray machine, resulting in an actually quite cool variation of the sonic complete with some gnarly-looking burn damage.

Concept artist Peter McKinstry – who also helped design the revamped Davros for the Series 4 finale – was tasked with bringing the burnt screwdriver to life. In doing so, he revealed an interesting detail of the device's backstory.

Along with his concept art, McKinstry noted that he designed the innards of the sonic – specifically those green crystals in the dome – as a nod to the Tenth Doctor's green time rotor at the centre of his console. He refers to the sonic as "the TARDIS' little brother", because they come from the same technology.

We've seen numerous times that the TARDIS can make a new sonic screwdriver, but the idea of them having this almost symbiotic relationship is something that's yet to be explored.

Imagine if the sonic also comes to life one day. And the Doctor fancies that too. That's got 'Moffat' written all over it.