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.

Murdoc is an assassin working for an organization known as H.I.T. - Homicide International Trust. his bosses get a little grumpy that he can't seem to complete his 'contract' to take out MacGyver - no idea when this was initially put out, that's not mentioned.


whenever they wanted to 'test' Mac's principles, they would bonk him on the head and give him amnesia. as a result, his 'basic' instincts would always come up and make him just do v MacGyver-y things. the poor man, in the real world, would have some serious traumatic brain injury going on.