The Google Doodles often pay homage to great scientists or other historic events, but today they’ve let their geek flag fly, and are celebrating the Doctor Who 50th anniversary with 8-bit versions of the doctors, and a timed game where you lead the Doctor through levels to collect the letters in Google. But there are Dalek’s about, so be careful, and don’t use up all 12 regenerations!
[Note: right now, I’m only seeing it on UK-related sites, not the US site. If that changes, we’ll update the link above.]