10 Doctor Who Fan Theories Better Than What We Got

The Doctor's regenerations have varied wildly over the years.

In the early days of the show, his face changed with very little fuss. However, after its 2005 revival, regenerations became huge spectacles of light and sound, often destroying the TARDIS in the process.

Reddit user Skunkwaffle has a theory for why this might be: they suggest that regenerations build up energy over time. As the Doctor reaches the end of their regeneration cycle, their transformations become more and more spectacular, as more energy is released every single time.

There's even an answer as to why Eleven into Twelve was such a lowkey change - the Doctor had just used his regeneration energy to destroy the Dalek ship, so he had very little left while inside the TARDIS.

Another cool theory as to why modern regenerations are more explosive than classic ones is because the Time Lords weaponised them during the Time War. So, when a Time Lord suffers a fatal injury, at least they might be able to take a couple of Daleks with them!