Doctor Fred

Doctor Fred Edison is a scientist who was first seen in Maniac Mansion and also appears in Day of the Tentacle.

He is the inventor of the time-traveling Chron-o-Johns which send Bernard, Laverne and Hoagie through time in an attempt to stop Purple Tentacle from taking over the world

In Maniac Mansion
20 years before the events of day of the tentacle a Meteor fell near the mansion and affected him. For years he did not sleep or eat and worked on the Zom-B-Matic. One of his victims would be Sandy Pantz if it weren't for her boyfriend Dave Miller and his friends who rescued her and got rid of the Meteor.