The BBC has launched the BBC Store where you can buy and download old TV shows from the broadcaster.
The BBC Store feature lots of classic TV shows and also some of their more recent ones, including the latest Doctor Who and more.
Prices for a single episode start at 1.89 and a series starts at £7.99, although dome cost more and the BBC are also offering bundles, for example you can get all three series of Sherlock for £20.99.
You can choose to buy the shows in either SD or HD and they can be downloaded to your computer, as yet the BBC has not launched any apps to allow you to download the shows direct to your smartphone or tablet, although these will launch in the future. You can find out more details at the link below.
Source BBC Store