You know, I might be wrong that this is the "greatest best" episode from the series. I just remembered an episode where MacGyver dies and has to escape the afterlife so he can rescue Pete from Egyptian terrorists.
I believe you guys are forgetting about the time macgyver hit his head and WENT BACK IN TIME TO TEAM UP WITH MERLIN TO KILL MORGAN LE FAY FOR INVENTING GUNS (it was a two parter)