Magnum, P.I. - Season 3 Episode 18
Forty Years From Sand Island

As part of the research for an upcoming Robin Masters novel, Higgins contacts a witness in the 1942 murder of a prison camp inmate by a civilian guard, and soon after is badly injured in an accident when the Ferraris brakes fail. When the mechanic confirms that someone has tampered with the car, Thomas sets out to find who wants to stop Higginss research, and uncovers blackmail and shady politics at the center of the case.