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If you go back from more modern Doctor Who to the Classic run, you will find it looks different - more low definition, and occasionally inconsistent in terms of quality. Why is this? Find out why here!

Chapters:

00:00 Introduction
01:14 Film vs Videotape
05:06 Frame Rate
06:56 Restoration in Black and White
09:51 Restoration in Color
11:46 Reverse Standards Conversion
13:19 Chroma Dot Recovery
15:11 Manual Colorization
16:08 A Blended Approach
18:12 Conclusion