2. A Deadly Dose

Marquardt teams up with an associate of the Boston Mob to launch a massive street fentanyl operation. As the death toll skyrockets, the DEA launches a national investigation

3. Where's It Coming From?

As law enforcement attempts to track down the origin of the deadly street fentanyl, they encounter a series of dead-ends. Only the chance arrest of a suspect in an unrelated case suddenly gives them the break they are looking for.

4. Prepare for Your Own Funeral

DEA introduces an undercover agent to infiltrate the fentanyl operation. But as they close in, they find themselves in a race against the clock to locate Marquardt - and the lab - before he disappears.