Aside from How I Met Your Mother, The Simpsons or Finding Nemo, if that counts, are there any movies or TV series involving someone explicitly stated or highly believed to have ADHD? I can't seem to find any on Google.
There are movies or TV series about schizophrenia such as A Beautiful Mind, bipolar such as Silver Linings Playbook and then there's this, but I can't seem to find any for ADHD.
Of course there are endless speculations on forums everywhere, but these are speculations likely from not properly educated people (e.g. not psychologists).
An example if this question was asking about OCD or Asperger's would be Sheldon Cooper from The Big Bang Theory. The show or creators have never stated any diagnosis, but people highly believe such. Sheldon even has his own article on Psychology Today.