Finally get to see this as I rewatch my other Doc 2 stories.
Overall a good story and the animation is very nice.
This lost episode is completely lost except for a few clips here and there as I recall. While being in black and white film might help convey the suspense a bit more, what can you do?
Also the animators inserted another easter egg Wanted Poster of the Delgado Master around 19 minutes into ep 2.
Also this was the last story with the companion Victoria, but the next story is Wheel in Space which brings in Zoe for the rest of the second Doctor's era.
Did you get to watch this, Ancient One?
Have not caught this, but I always did wonder if it was possible to have animated stories for various Doctors that have since moved on. But when they have done it, like for the Tenth Doctor, the animation has not been good.
I would prefer more of a standard 2d animation myself.