The Devil You Know
| Episode Number | 21 |
|---|---|
| Season | 8 |
| Aired | 2018-05-04 |
| Overview | Frank goes head-to-head with a data-tracking company when they refuse to unlock the phone of a terrorist that may hold information regarding upcoming targets. Also, when Erin obtains information about an impending murder from a shady source, she gets Danny and Baez involved, despite the questionable agenda of the informant, and Jamie and Eddie try to locate a woman who kidnapped a newborn baby. |
| Runtime | 45 minutes |
| Absolute Number | 176 |
| Finale Type |