In which movie is a man killed in his own dream and men in suits look over him? Also his friend is a dentist who starts to believe that the main character is involved in a conspiracy and then the dentist is killed in one of the dreams. But in the real world the deaths appear as accidents.
This was either a TV movie or episode in a show from the seventies or eighties, The main character is a doctor or reporter type role, but the key part is the deaths are accidents in the real world. But in his dreams he knows they are assassinations.