Don't Eat the Snow in Hawaii - S1-E1
Factual error: Magnum manages to lure the dogs outside making them wail in pain as he plays a sound that greatly bothers them. As great and sensitive as dog hearing is, Magnum put in the sand past the perimeter wall of the mansion a little Sony Micro cassette recorder M-202 and played the sound off its in-built speaker. That would hardly produce, especially at that distance, an output worth the kind of reaction displayed here.
Don't Eat the Snow in Hawaii - S1-E1
Factual error: Magnum phones Rick at his Casablanca-like establishment and tells him; "Two guys tried to run me off the Pali Highway. They deep-sixed about a mile past Lanai Lookout." Lanai Lookout is not on the Pali Hwy, it's 15 miles driving south off the east end of the highway, and Magnum was in the Nu'uanu part. (00:40:35)