Anyone who grew up with Transformers in the '80s or '90s will remember the allure of the many protoypes visible in the catalogues of the era, especially as they were often different to the toys we had in hand. Well, today, we're joined by a very special guest in Ras, a vintage prototype enthusiast who has the largest collection of pre-production Transformers currently known, including the only privately-owned copy of G1 Unicron from 1986! If you've ever been interested in what these prototypes represent, this is an episode not to miss.