Conor Devlin is not taking the death of his son lying down. Even from his jail cell, he plots revenge.
Devlin order the death of Owen's daughter and Mike's sister. Knowing that other members of the team have families now at risk, they are sent to a safe house, Shelby's family mansion.
The trouble is that Alex has a fractious reunion with her mother, not happy she is a target thanks to her daughter going back to the FBI.
Harry's sister who just happened to have moved to the USA, she did not know that Harry worked in law enforcement. Given her accent, I would be demanding a DNA test if I was Harry.
It is not long before some strangers are seen prowling and the safe house is really not so safe.
It does make you wonder why all of them were shacked up in one place and not split up. Also why no one else for the FBI were assigned to guard them all. It looked like the orders were your family, you are responsible for them all.
There is some tense action when the team are in danger but the writing was a bit silly. The prime example was Mike telling Devlin: 'just give me a reason.....' Hold on he just had your sister killed; you need more reasons!