Also, a personal issue for Tan arises when a colleague is hurt in the field; Hondo's inquiry into the arrest of a homeless veteran for Leroy, Darryl's father, sparks an idea for a new policing initiative; and Luca suspects the mother of his mentee, Kelly, wants to date him.
In "Shaky Town", it is revealed that he speaks fluent French.
Also, Deacon and his wife, Annie, work to free a reformed drug dealer who they believe was sent away for a murder he didn't commit.