I'm new to the show and have only been watching the reruns not the new episodes.  I saw the one where Reid gets taken and injected with drugs and then takes them.  I was wondering in what episode does the team find out that he's taking drugs?

I am not sure what episode that the rest of the team becomes aware, but I really have an issue with this so called "addiction" that they saddled on Spencer.  He was held for 48 hours with the multipersonality unsub and injected with dilaudid.  If this is long enough to become addicted then every surgical patient is going to be in serious trouble.  As a recovering person and also a nurse the writers really need to get their facts in order.