Elementary Season 1 Episode 15
A Giant Gun Filled With Drugs
Sherlocks ex-drug dealer comes back to ask for his help when his daughter has been kidnapped. When Rhys thinks that Sherlock isn't solving the case fast enough, he offers him drugs to speed up the process. Sherlock refuses. Watson and Rhys are held captive by a member of the cartel who has kidnapped Rhys' daughter but Rhys and Watson save the day by disarming him.