He is the brains and the financial power behind S.T.A.R. Labs. Dr. Harrison Wells started out the show as a mentor and hero to Barry Allen. Someone we expected to guide him through getting to know his powers and a leader of the technical team supporting Barry. We also see him in a wheelchair, evidently he has been paralyzed from the waist down since the accident.
This seems like an arc that will take a while, with lots of small hints before we figure out his motives\intentions.
S1 E1 - (end of episode) - in a secret room at S.T.A.R Labs, Wells reveals he is not paraplegic, while reading a newspaper from the future concerning Barry's fate as the Flash.
**Use Spoiler Tags if it hasn't hit TV yet - we'll be following the initial airing schedule**