There comes a time on a Saturday morning when parents announce that cartoon time is over. They have plans for the day. While other kids sit around in their pajamas, you're being dragged to shopping malls, lumber yards or the house of a great aunt. Or the worst fate of all: raking leaves. For many kids growing up in the mid-'70s, the three titles on Filmation's Sci-Fi Box Set were only seen on the ratty black and white TV in the barbershop. Ark II, Space Academy and Jason of Star Command were mysterious shows that some swore they'd watch when they were old enough to stop doing yard work and waste an entire Saturday on the sofa. »»