PB3 and the Jacket

An exciting adventure with a friendly extraterrestrial and his robot. When a big black spaceship arrives everyone is afraid. Who is in it? What do they want? Two children, Sue and Ben, dive into the sea and meet PB3 and his robot, Robin.
Together they come face to face with the bad OOs from Planet X011 and together they discover a terrible plan. Can they stop the OOs?