The Master threatens to take over New York with his control over lightning.; Ted and Alan escape from the dinosaurs only to be captured by a tribe of cavemen.; Someone kills Scorne in prison to keep him from talking. Gary and Guppy go searching for the killers but end up in a cloud of poison gas.; Hop flies a sick patient to a hospital in Alaska while Maurice tries to make time with Gerry.; Pete and his friends work in a restaurant in order to make money for a radio license.; Scribbly's boss arranges for him to spend Christmas on a farm in the country, and Dinky tags along.