There probably is but I've never gone looking! MacGyver fandom doesn't really seem to have moved to AO3 - it's old enough that I think a significant amount of the fic predates the concept of web archives, and that makes it tougher to move even if the people are still around. The largest pairing in the small amount of fic on AO3 is Sam Carter/Jack O'Neill, if that tells you anything...
Murdoc was definitely a villain but I have no memory of how or why he was a villain or who or what he was working for.
One thing I really liked about Mac is that it was central to his character that he was principled. And the show wasn't all that interested in testing his principles or making him wrestle with them (unlike, say, a show about a certain other Mac) - 90% of the time, he made sticking to his principles look as easy as defeating the bad guys with nothing but a paperclip and a stick of gum.
no subject
Murdoc was definitely a villain but I have no memory of how or why he was a villain or who or what he was working for.
One thing I really liked about Mac is that it was central to his character that he was principled. And the show wasn't all that interested in testing his principles or making him wrestle with them (unlike, say, a show about a certain other Mac) - 90% of the time, he made sticking to his principles look as easy as defeating the bad guys with nothing but a paperclip and a stick of gum.