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Watch The Secret Number (Short 2012) online — it may be available on legal streaming platforms such as YouTube, Netflix, Prime Video, Hulu, Disney+, and others.

Dr Tomlin is a psychiatrist. One of his patients is a former professor (Prof. Ersheim) who is convinced that there is another whole number which is meant to exist between 3 and 4. While Ersheim is sectioned and struggling to work out this number, Tomlin experiences some strange things and a memory from his youth of a car crash is triggered.