ORIGINAL AIRDATE: November 16th, 1987 ---
In the wake of a friend's death, MacGyver's attacked by a familiar (heavily-scarred) face.
MISSION: A climbing accident causes the death of a close friend of MacGyver. In his mourning, MacGyver is preyed upon by the returning master of disguise, Murdoch!
This week's highlights include:

 

Graboid (Science fiction)

The Graboid is a fictional species of sandworm that acts as the primary antagonist of the Tremors franchise. The creature made its debut in the 1990 film Tremors (although the name "Graboid" was only mentioned briefly), and reappeared in its four sequels and the Tremors television series.

Check out the article on wikipedia: https://en.wikipedia.org/wiki/Graboid.

Watch S3E8: "The Widowmaker" on CBS's website or check the alternative streamability of this episode here.