The third season of the American television series MacGyver, consisting of 20 episodes, began on September 21, 1987, and ended on May 9, 1988, and aired on the ABC network.

[2] MacGyver helps a former hit-man in the witness protection program after the mob rediscovers him.

Jack Dalton's antics get him and MacGyver thrown into a Southern work camp with a corrupt warden.

The intentions of the corrupt sheriff, the warden and the greedy mine owner are to find stolen money.

MacGyver and a mountain hermit work together to try and stop a chemical plant owner from illegally dumping radioactive and toxic waste into a stream.