In the modern age it is now possible to watch many of your favourite television programs absolutely free on the Internet. This is something that would have been unheard of decades ago but now with the help of streaming technology, it is possible for even the most novice of computer users to watch their favorite shows online wherever and whenever they want. Dr Who has had somewhat of a resurgence in recent years and is one of the most popular television shows to be watched online and therefore there are a number of different sites that you can watch both new and old episodes with ease. One great site where you can watch pretty much every episode of Dr. Who is www.iwatchdoctorwho.com/ here you can easily select your chosen episode and either download or watch it directly online. However, to do so, you will need to download the relevant software to watch it (using getxvidcodec.com/setup/uk/). If you do not want to have to download any software to your computer or laptop in order to watch your free Dr. Who episodes then you can try using www.megavideo.com/ instead. This site will allow you to watch full episodes for free but only one per day as you are limited to approximately 50 minutes of viewing per day. If you want to watch more than that you will need to become a paying member.
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You can watch free full episodes of Doctor Who online from Youtube...
You can watch any episode of Doctor Who through www.PVRmode.com
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If your in the UK maybe you can watch some on the BBC I-player? I know they show recent programmers, I'm not sure if they show older repeats but you can check.