This is incredible for #DrWho fans - two episodes of Daleks Masterplan discovered. These episodes screened once in the UK in 1965 and have never been shown anywhere ever since. https://www.bbc.com/news/articles/c4g7kwq1k11o
Lost Doctor Who and the Daleks episodes discovered in 'ramshackle' collection

The Doctor's assistant Peter Purves was invited to a screening of the episodes in Leicester.

More on this:
- two more appearances of Adrienne Hill as Katarina, a short lived companion who we only had in 1 existing episode before this
- the first ever appearance of Nick Courtney, who went on to a long association with Dr WHo as The Brigadier, but here in a different role
- two more episodes directed by the great Douglas Camfield, in my opinion the best director of classic Dr Who
It is highly unusual for Dr Who not to have screened in Australia, but the censors didn't like this one and it was rejected. As a result it wasn't available for sale anywhere else either, and so is the only Dr Who story to be shown exclusively in the UK (along with its 1 episode teaser story Mission To The Unknown). They didn't have repeats in those days, so it was only shown once.
It was a 12 episode epic, episodes 5 and 10 were discovered in a Mormon church owned building in the 80's, and episode 2 was returned in the early 2000's by someone who had the job of destroying it in the 70's but kept it instead. Everything else was missing until now, when episodes 1 &3 were found in the collection of a recently deceased film collector.
This is great, they got Peter Purves, who played the companion Steven, to attend a cinema under false pretenses and then surprised him with a screening of the two episodes he starred in which nobody has seen for over 60 years https://www.youtube.com/watch?v=HlJpKllRNhw&t=456s
The Daleks Masterplan Missing Episode Recovery BBC Breakfast Report 13/03/26

YouTube
To put it in perspective this brings down the number of missing Dr Who episodes from 97 to 95. And it's not likely that those remaining ones are sitting in collections waiting to be found, most likely they were destroyed as intended, but there is always hope that some escaped destruction and are still out there.
One more thing on this - the recovery is thanks to the efforts of a wonderful organisation called Film Is Fabulous. They are doing an incredible job of ensuring the preservation of all sorts of film that might otherwise be lost forever https://filmisfabulous.org.uk/