MacGyver (1985)

S4E15 The Invisible Killer

MacGyver leads a group of four Phoenix Foundation colleagues on a wilderness retreat aimed at relieving stress. However, their trip takes a turn when they learn about a prison bus crash that has released several inmates. As tensions rise, the group starts to suspect one another's motives. MacGyver finds himself in a race against time to determine who, if anyone, poses a threat before the situation spirals out of control.