Teresa's ambulance is hijacked by a thief who threatens to kill her if she doesn't save his brother, who's been shot in the heart during a burglary; Ray and Tom go undercover to track down a trio of larcenous pranksters, who get the scare of a lifetime when they're captured; David has a horrifying time at a Hollywood Halloween party when Andrea breaks off their relationship and Marian accuses him of adultery.
Donnie Wahlberg
Detective Joel Stevens
Neal McDonough
Assistant District Attorney David McNorris
Mykelti Williamson
Police Department Detective II Bobby 'Fearless' Smith
Gary Basaraba
Police Department Police Officer III Ray Hechler
Lana Parrilla
Teresa Ortiz, paramedic in season one, rookie police officer in season two
Jason Gedrick
Police Department Police Officer II Tom Turcotte
