Congrats to my fellow Whovian Catlady in training!
And thanks to CIT and Ravin' Ray for votes. I wanted to do an Escher piece for for this challenge (rather than a regular 'infinity' cover) and only after I'd posted the Doctor Who cover did I realise that I could have gone with this one instead:
But Doctor Who has been my favourite TV programme since I was 5 (and Jon Pertwee was the Doctor) so it's nice to show my love for it here.