At the 44:25 mark as MacGyver jumps onto Marsh's car, his hair becomes a dark-brown/black as the stunt double takes over.
MacGyver uses a tape recorder to capture phone dialing, and he speaks loudly towards the end. When the tape is played, his voice is not heard.
As established in "Serenity", Serenity is located in Montana. However, Hole-in-the-Wall was in Johnson County, Wyoming, considerably south of the Montana/Wyoming border.
In "Runners" we learned MacGyver was seven years old when his father died, but here he claims to have seen him when he was ten years old.
Despite the fact he's working undercover to infiltrate the logging company, MacGyver uses his real name.
A photo of crumpled, burnt paper shows it to be perfectly flat.
The police interrogate Roxy, a primary suspect in Rogan's death. However, she produces an alibi so iron-clad that they don't at all believe she was responsible. It's implied there were witnesses at her workout. And yet as the episode proceeds, it's clear that her alibi was false. How she was able to create an unbreakable false alibi is overlooked for the rest of the episode.
Deegan has an operator trace an "open line", but since Pete hung up the phone, this would not be possible.
Though it rains at one point in the episode, later scenes set immediately after offer no evidence of precipitation.
Pete's Phoenix Foundation ID card shows him not in business wear, but the precise fishing outfit he's wearing in the episode.
Trivia: The coordinates for the gold stash (62° 41' 19" N, 164° 19' 38" W) pinpoint an area about 20 miles from the coast of the Bering Sea next to the Yukon River in Alaska. It is entirely possible that such a route would be used flying from Russia to the U.S.
Blood disappears off a prop booby-trap that had previously been shown to have blood on it.
MacGyver as a youth has his hair parted on the opposite site from where it should be.
The hockey game that the hitmen are watching in the hotel room is actually a clip from the third season episode "Thin Ice".
On-screen, David Bloom's character is referred to as "Simon". However, the end credits list him as "Gil".
Jack's birthday is February 3, 1951, making him 37 years old at the time of this episode.
MacGyver crashes a Jeep with square headlights, but afterwards it suddenly has round headlights.
Danny steps in oil as he runs through the basement. When he runs into the hallway upstairs, he doesn't leave any oily footprints behind him. When Spider and Watts enter the hallway, the footprints aren't there. But when Spider looks down, the footprints suddenly appear.
MacGyver's watch is missing in the shot of him picking up bullets.
A Smith & Wesson would not discharge from the single action position without the trigger actually being pulled. The breech block would prevent the gun from firing.