Portman and Ruffalo join the English voice cast of this film about a time-travelling boy from Earth’s drowned future and a girl with a robot nanny Portman and Ruffalo join the English voice cast of this film about a time-travelling boy from Earth’s drowned future and a girl with a robot nanny T his animated feature has lots going for it: expressive character design, a delicately melancholy musical score, and plenty of strong emotional beats, but the script is a touch too derivative for its own