Episode 498 of the online podcast 'When Wagon Wheels Were Bigger' recently (24 february 2025) devoted an episode to Rupert, and espcially to the 1970's Rupert puppet tv-series from the BBC. It's available to listen to via Spotify, Apple podcast and LibSyn. When Wagon Wheels Were Bigger is a weekly podcast that watches kids' TV from the eighties and casts a more cynical eye on the shows the makers used to love.
Their description is as follows:
Some classic haunted puppet fun this week as we watch Rupert Bear in a decidedly more supernatural setting than his bejumpered and chequered appearance would have you expect.