10 Doctor Who Details You Definitely Missed The First Time

10. A Masterful Connection (The Lazarus Experiment)

The Lazarus Experiment - or, that episode where Mark Gatiss turns into a scorpion rendered on a PS2 - is one of the less memorable stories from Series 3, to put it kindly.

But to give it some credit, it does feature a really nifty detail that, in true wibbly-wobbly fashion, calls forward to a future episode.

The bulk of the action takes place in Lazarus' laboratory in London. Throughout the episode, a swirling group of circles can often be seen on the walls, which serves as the logo for Lazarus' company.

Oh, and it's also identical to the design of the Master's ring that would be revealed later in the series.

Outside of being a very stylish piece of bling, the ring is also essential to the Master's scheme to bring himself back from the dead. This is a goal he shares with the good professor, who is also trying to cheat death.

It's a detail that not only ties the two characters together thematically, it's also another example of the Master's (who funded Lazarus' work) overhanging presence in Series 3.