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.
MacGyver: My hometown had grown up a whole lot in the years since I'd been back. But comin' home was still like reachin' into a grab-bag full of memories, some of them good, some of them not so good. The decisions we make shape our lives. When I was a kid, I made a bad decision about a gun, and my life was never the same.
Chuck: Don't start, MacGyver. Everybody has a right to defend themselves. If he doesn't buy it from me, he'll just buy it someplace else.
MacGyver: Well, now that's original; did you come up with that yourself?
Danny: I still remember that homemade volcano you showed me how to make.
MacGyver: Oh, yeah, did you get it to work?
Chuck: We had to repaint the kitchen.
MacGyver: Dragnet—the show that made you what you are today, huh, Neil?
Neil: Nah. I couldn't get in the Army.
Danny: I might need it to scare 'em off.
MacGyver: It never stops there, Danny! You got a gun; things happen. People die!
Sean: Danny is my best friend.
MacGyver: I don't think you have friends anymore. You have sources!
The Italian episode title is "Giocando con il passato", meaning "Playing with the Past".
Though credited, Dana Elcar does not appear in this episode.
This episode was publicized as the season premiere by ABC, though it aired nearly a month after "The Secret of Parker House", which they had called a Halloween special.