'Trying to remember the name of a sci fi pilot (or mini series?) from the 80's. It had a space ship with a crew of cadets. The captain gets killed and the kids find themselves facing off vs a fleet of enemy warships, with a traitor saboteur on board. One scene I do remember has the ship faking being shot down and exploding on an ice moon, hiding the ship under the ice and giving them time to repair and attack from surprise. The show was NOT Earth Star Voyager, but I seem to recall it came out about the same time. Any answers?'