If you've seen the fourth installment of the Transformers film series - Transformers: Age of Extinction - you may have noticed some star turns from the other "transformer" robots. All told, 13 Kawasaki robots - four different models from two different series - make appearances in the film. The robots were used on 3 different sets in upwards of 6 scenes, all of which take place at the Chicago headquarters of a corporation called KSI. All Kawasaki robots work in the service of KSI's goal to reverse engineer the good-guy Autobots and bad-guy Decepticons and create the first human-built Transformers. In one scene a Kawasaki robot model RS06L melts down the head of Ratchet, a beloved Autobot slain earlier in the film.