Medium - Season 3 Episode 21
Heads Will Roll (3)

The investigation of the murder of Walter Paxtons wife continues, as it is now determined that a serial killer is on the loose. While helping Devalos and Scanlon with the case, Allison discovers that her new friend Debra is the next victim. Allison goes to great lengths to protect Debra, but is shocked to find that her new friend isnt who she thought she was. Meanwhile, Joe debates being part of a lawsuit against Aerodytech, the company hes been loyal to for years.