Glee returns to Fox next Thursday for the first time since the death of Cory Monteith.
Monteith, who played Finn Hudson on the show, was found dead in July. An autopsy revealed he died of an overdose of heroin and alcohol.
Substance abuse specialist Janet Riley-Wright stopped by the FOX8 Studios on Thursday morning to talk about the extremely addictive drug. In the video above, she talks about the signs and symptoms of heroin use and addiction. In the video below, she discusses how to treat the illness.