Three For the Road - S2.E10

A retired actor and his wife stop at a motel on the way to Los Angeles. MacGyver rescues them from a drunkard who nearly makes a mark on their car.

MacGyver is supposed to meet a mobster-turned-informant at the motel, but the meeting goes wrong. The mob shows up and kills MacGyver's friend before he can give MacGyver what he promised. Instead the bag lands in the old couple's car, where the old actor finds it and discovers it full of money.