There are now sites that legally offer the chance to watch episodes of the show's original run online.

These are the ones we currently know about, we'll update this list as we go along - feel free to email the mods with any additions.
Also What we don't know is if any of these sites are region locked, if so please let us know.


You Tube (The BBC's own You Tube channel) Series Index
The Edge of Destruction - Season 1 / 1st Doctor / 2 episodes Link to first episode
The Sensorites - Season 1 / 1st Doctor / 6 episodes Link to first episode
The Krotons - Season 6 / 2nd Doctor / 4 episodes Link to first episode
Carnival of Monsters - Season 10 / 3rd Doctor / 4 episodes Link to first episode
Planet of the Spiders - Season 11 / 3rd Doctor / 6 episodes Link to first episode
The Mask of Mandragora - Season 14 / 4th Doctor / 4 episodes Link to first episode
Full Circle - Season 18 / 4th Doctor / 4 episodes Link to first episode
State of Decay - Season 18 / 4th Doctor / 4 episodes Link to first episode
The Awakening - Season 21 / 5th Doctor / 2 episodes Link to first episode
The Caves of Androzani - Season 21 / 5th Doctor / 4 episodes Link to first episode
The Twin Dilemma - Season 21 / 6th Doctor / 4 episodes Link to first episode