1) In the year 2500, electricity was brought to Pen-y-Craig Farm for the first time. While most were excited, Gran was sad to see the old paraffin lamp go.
2) That night, the first moon expedition launched but crashed landed in a nearby field. Gran's husband Mortimer Griffiths secretly joined the expedition in place of an injured crew member.
3) Over subsequent nights, Gran went to the top of a nearby mountain to watch the shrinking moon, hoping to see Mortimer. When the moon was no longer visible, she accepted he was lost and married Llewellyn Time Machine. Two days later, Mortimer returned from the moon.