[s5e17] - Occupational Hazards

The episode features three primary storylines involving different members of the Reagan family:

Erin Reagan (Bridget Moynahan) becomes unnerved after discovering someone has been breaking into her apartment. The situation escalates when her co-worker is attacked at the office after hours. Danny Reagan (Donnie Wahlberg) eventually discovers that the break-ins and attack were committed by a motorcycle gang member and his girlfriend, who were attempting to frame a rival gang leader currently being prosecuted by Erin. [S5E17] Occupational Hazards

Jamie Reagan (Will Estes) and Eddie Janko (Vanessa Ray) respond to a call from a confused elderly woman suffering from Alzheimer's disease. They discover a pipe bomb in a room she had rented out. The investigation leads them to an ex-union worker who planned to use the bombs to target a union meeting. Jamie Reagan (Will Estes) and Eddie Janko (Vanessa