Plot summary
When human bones are discovered in a ravine related to a fifteen-year-old case, Sam teams up with his old training officer, Charlie Walsh ( Al Sapienza ), to solve the crime, only to realize that Charlie's personal life isn't what it seems and makes Sam rethink his career. Dov and Chloe have to deal with a witch and argue over the best course of action, which also involves her unhappy client.
Credits
Adapted from Wikipedia contributors, Rookie Blue season 4. HTML formatting and reference markers removed.