Other mistake: In the starting titles, the newspaper clippings state that Doogie sails through high-school in 9 weeks, the article says he is 12 years old. The next clipping says he graduates from Princeton at age 10.
Continuity mistake: When Doogie goes into his en-suite bathroom to shower, he takes off his dressing gown completely before pulling back the shower curtain to get in, at which point he gets temporarily blinded by a fan taking a photo of him with a camera. A few seconds later, he's shown putting his dressing gown back on, even though there wasn't enough time for him to have picked it back off the floor and start redressing.
