Google.co.uk is showing one of the company's famous Doodles today, but it's unlike any other you've seen. It's to celebrate the 50th birthday of the classic British sci-fi TV show Doctor Who, and it's a fully playable computer game in the best platforms-and-ladders 8-bit style.
The first episode of Doctor Who was transmitted back on November 23, 1963, and apart from a gap between 1989 and 2005, it's been a more or less constant part of the British consciousness ever since. It's also one of the longest-running TV shows in the world. Interestingly enough, one of the iconic pieces of tech the Doctor employs, his sonic screwdriver, has now almost been made in real life, and could have important uses in medicine.
Google's game is surprisingly hard, even if (like the fabled Doctor himself) you have a large number of lives instead of the traditional three. You may need your own time machine to claim back the half hour you'll spend playing this at your desk this morning.