The Inner Limits (S05E11)

Paul thinks that his brother George is incapable of much due to his disability and what doctors have conveyed to him and their mother. Jonathan and Mark decide to visit George, hoping to uncover the thoughts he’s always wanted to express but never could. They start by checking if George can comprehend basic commands. After gathering the right tools, George manages to communicate something important to his mother and Paul. Fast forward two years, and George publishes a book titled "No Inner Limits."