ORIGINAL AIRDATE: January 12th, 1987 ---
Mac heads to the bayou to help rescue Pete's estranged ex-wife and son from terrorists.
MISSION: Pete's family is held ransom by a figure from his past and MacGyver enlists himself to join the rescue mission.

This week's highlights include:

Pete's son stayed in class when Bueller took the day off.

Dead reckoning (Navigation)

In navigation, dead reckoning or dead-reckoning (also ded for deduced reckoning or DR) is the process of calculating one's current position by using a previously determined position, or fix, and advancing that position based upon known or estimated speeds over elapsed time and course. The corresponding term in biology, used to describe the processes by which animals update their estimates of position or heading, is path integration.

Check out the article on wikipedia: http://en.wikipedia.org/wiki/Dead_reckoning

Watch S2E12: "Family Matter" on CBS's website or check the alternative streamability of this episode here.