The browser based, free-to-play MMO, Doctor Who: Worlds in Time, based on the ever popular Doctor Who is now live and playable. In a partnership between BBC Worldwide Digital Entertainment and Games and Three Rings, the team behind Spiral Knights, the game centers around saving London and fighting against Autons, Clockwork Robots, Zygons, and of course Daleks.

The game is free-to-play but of course there’s the micro-transaction option of buying customizable pieces for their avatar and buying hints on the mini games. For more info check out the Sega blog and head on over to play the game here.