Josh rescues two children whose father may have attempted to kill them.

Grace attempts to negotiate love-struck teenagers threatening suicide, revealing her inexperience.

Stella is shot by a gunman trying to commit suicide-by-cop who turns out to be Lawson's old mentor.

A convicted criminal escapes transport, assaults Grace and takes a woman hostage.

A robbery at a suburban pub turns into a siege situation when the criminals barricade themselves inside and take hostages.

As TR investigates an alarm at a high-security laboratory, Michael is bitten by a caged monkey who may carry a fatal disease.