I was born 1978 as an 8 or 10 year old kid I remembered watching a movie, on tv, involving a scientist or robotics engineer uncovering an evil plot and escaping the lab. On returning home (appartment in an American city late ? early 80s) he tells his ?girlfriend who later tries to kill him. Her arm gets cut off as some point in the escape and reveals she is a robot clone. He eventually fleas to family that live in a rural farm. They have a son and daughter . They all turn out to be humanoids and eventually try to kill him. One scene is of the boy robot driving a front end loader and is about to kill the man (strong lead actor) but tbe loader hits the light and the robot is electricuted. That is all I can remember. Thanks