Ellen Ripley
Bishop is a fictional character in the movie "Aliens", who was portrayed by actor Lance Henriksen. The character is the science officer of the "Sulaco", and whose actions (and self-sacrifice) are critical to the survival of Ellen Ripley. When Ripley discovers that Bishop, like Ash (an antagonist of the first "Alien" film), is also an android, she treats him with extreme distrust due to her previous experiences.