Question: Who is best known as the co-star of the 1960s television series" I'm Dickens, He's Fenster" that also  is on a graphic adventure game developed by Activision and released for Windows in 1997?
Sentence (from "Zork Nemesis"): The story focuses on players investigating the sudden disappearance of four prominent figures and their children to the hands of a mysterious being known as the "Nemesis", and uncovering a sinister plot during their investigations that they must thwart.
Relevant evidence: No