Someone in San Francisco has been attacking Vietnam veterans with military-issue hand grenades. Two ex-soldiers have already fallen victim to the mystery assailant, and one of them has been killed. Ironside's aide Mark (Don Mitchell), a friend of the dead man, wants some answers--and thus he sets himself up as bait to lure the killer out in the open. This is one of several early-1970s TV programs centering around the tragic residue of the still-raging Vietnam conflict. ~ Hal Erickson, Rovi