In charge of Starbase Crusader
Master Computer was in charge of operations on Starbase Crusader and manned by Doctor Morrow. The computer malfunctioned when it was invaded by a Shadow Wraith called Spectre. But with help from the Ghostubsters, Doctor Morrow managed to fix Master Computer just in time.
Master Computer first appeared in the episode Cyman's Revenge
The voice of Master Computer was provided by Peter Cullen