1977 - Lord Louis Mountbatten, 1st Earl Mountbatten of Burma appeared on the UK TV show This Is Your Life. 22.22 million people tuned in to watch the program. This is Your Life was a British television show which was based on the 1952 American show. The host surprises a guest before taking them through their life with the assistance of the 'big red book'.

https://www.bigredbook.info/louis_mountbatten.html