These are the tales of the Doctor’s early adventures in time and space and perhaps the repecussions thereof.
Season 2
2.1 - The Yes Men 
2.2 - The Forsaken
2.3 - The Black Hole
2.4 - The Isos Network
4.1 - The Night Witches
4.2 - The Outliers
4.3 - The Morton Legacy
4.4 - The Wreck of the World