Two Android Talk

I tried searching for a topic about this issue and didn't see one out here yet. One of the burning questions I had about the movie was the lack of follow through about the second android that was hinted at in earlier interviews with Ridley Scott. Was it all just a red herring and there never was one to begin with or did they just not follow through on that plot device? Aside from the accusation made by Capt. Janek to Vickers I didn't see where they really touched on this subject? Any other thoughts on this?