Grissum was the captain of the Crimson Sunrise for several minutes before it was destroyed. He was on the bridge of the Crimson Sunrise when a rogue comet struck the Antiproton Storage Tanks that fueled the ship's engines. It was a million to one shot that the tanks would have been hit in such a way, as they are extremely well armored. He was one of the few crew members killed, as he was not able to make it to the escape pods before the ship was destroyed. The Eureka Maru, and later the Andromeda Ascendant, arrived and rescued the crew in the escape pods.