Episode 66 of "JAG"
s04e05 The Martin Baker Fan Club

Harm volunteers to defend a psychotic Vietnam vet accused of aiding the suicide of a fellow V.A. patient. While Harm argues in court that Roscoe Martin withheld the victims medication as a way to free him from the trancelike state in which it left him, the prosecution claims that the lack of medication is exactly what caused the mans death. Disappointed with the direction of the case, Roscoe feels that the cards are stacked against him and engineers an escape from the V.A. facility with three other patients. Their escape takes them to Harms apartment, and a negotiable situation turns deadly when guns are drawn and a SWAT team swoops in to help with what it sees as a hostage situation.