There's a rich history to these missing episodes that shouldn’t be ignored. It’s certainly plausible more are out there. After all, look at 'The Enemy of the World' and 'The Web of Fear' – found in a station in Nigeria back in 2013. That find was a once-in-a-lifetime event but …

This is a monumental task you've taken on, hats off! It's fascinating how commercials can offer a glimpse into bygone eras, not to mention the shows that have fallen through the cracks of time. I've been compiling lost media from defunct production companies for years, and the thrill of discovery …