The Question and Answer section for Do Androids Dream of Electric Sheep? is a great resource to ask questions, find answers, and discuss the novel.
Sorry, this is very much an opinion piece as well as an essay topic. This is only a short answer forum.
You might consider Dave Holden who is a bounty hunter with the police department who is seriously injured by the android Polokov. His injury opens the door for Rick to be the department's lead bounty hunter.
The mood organ is reflections of the artificial process humans go about using to feel good about the world and themselves. They are sort of like the "soma" pills in Huxley's Brave New World. Their dependence on mood pills represents the...