Just a recap: These two games are based on the current season of the show that stars Matt Smith as the alien Time Lord. Developed by Sumo Digital they were released for free via the BBC but only UK residents could install and play the games. Two more chapters for Doctor Who The Adventure Games have been announced but have yet to be released.
[Via email press release]
Update: Direct2Drive has apparently jumped the gun and released the Doctor Who games early. Also the game bundle price is actually $4.95.