A police officer investigates suspected overdoses that may be homicides and hit close to home.

Mickey endangers herself following up on a lead; Mickey brings Thomas and Truman to Thanksgiving.

An ambush leaves Mickey reeling; a Christmas revelation gets Mickey closer to the truth about Kacey.

Mickey faces the consequences of naming Paula; Jimmy Scanlon leads Mickey to surprising places.

Mickey makes a big mistake in her hunt for the killer; a major showdown turns deadly.