The Black Hole (audio story)

 was the third story of the second season of The Early Adventures. It was written by Simon Guerrier and featured the Second Doctor and Jamie McCrimmon, both voiced by Frazer Hines, and Victoria Waterfield voiced by Deborah Watling.

The story is notable in that it offers an alternate account of Second Doctor's history to the Season 6B theory. It explains why the Doctor was working for the Time Lords in The Two Doctors and why Jamie was aware of their existence.

Publisher's summary
On a research station near a black hole, time keeps standing still. Investigating the phenomenon, the Doctor, Jamie and Victoria discover a power far greater than any of the monsters that have challenged them on their travels... The Doctor's own people.

With the safety of thousands balancing out the need to flee, and a policeman from his home planet working at his side, the Doctor reluctantly finds himself involved in a race against time.

But nothing is ever as simple as it appears. And if you can use the Doctor's compassion against him, you have the makings of a perfect trap...

Plot
to be added

Cast
Narrated by David Warner
 * Jamie McCrimmon/The Doctor - Frazer Hines
 * Victoria Waterfield - Deborah Watling
 * Constable Pavo - Rufus Hound
 * Commander Flail - Janet Dibley
 * The Seeth/Pavo (uncredited) - Anthony Keetch

Continuity

 * After these events, the Doctor and his friends have their memories erased, which is why Jamie does not know of the Time Lords when the Doctor summons their aid. (TV: The War Games)
 * Victoria recalls encountering evil scientists, including Maxtible. (TV: The Evil of the Daleks)