How is Breaking Bad established as a thriller

Breaking Bad was written by Vince Gilligan who was already know for his writing of gritty thrillers such as the 'lone gunman'. Breaking Bad however is not a film, yet there are significant elements taken from thriller films that Vince Gilligan has incorporated into a 50 minute per episode TV series. At the start of every Breaking Bad episode regardless of importance there is two minutes that distinguish the mood in which the episode is to revolve around. for example there is an episode that starts with a teddy bear floating in a swimming pool, foreboding the final moments of the episode in which a plane crashes and the bear falls from the plane and into the main protagonists swimming pool. In this particular scene there is High pitched screaming noise which further forebodes the latter events but also is painful to listen to and therefore further illustrate Breaking Bad as gritty thriller. The music in Breaking Bad offers a key convention that are found in all thriller films as it is erratic and immediately puts you on edge. The main story is about a chemistry teacher who is diagnosed with cancer and cooks crystal meth in order to provide for his family. Another thriller convention apparent in Breaking Bad is the idea that the main protagonist 'Walter White' is visible within the first two minutes of the first episode. Gilligan also uses periodic table elements to fit into the cast members names. The idea of science and symbols also contribute to a psychological aspect of thriller films and this method is used in many thriller films including 'The Da Vinci Code' and 'Se7en'.