Only Fools and Horses episode that most people probably missed – which was grandad’s last ever appearance.The episode Licensed To Drill was filmed in 1984, and wasn't the stereotypical Only Fools episode because it had an underlying educational purpose to it, which detailed the versatility of oil.In the episode, Rodney and grandad watch an old war movie but then Del interrupts with this classic catchphrase "this time next year we'll be millionaires" when talking about oil in the North Sea.There are a few jokes thrown, but things were pretty muted, and then grandad says that he thinks oil comes from 'the garage'.Del then teases Rodney about his two GCEs as he doesn't know where oil originates from either.David Jason's charatcer thengoes on.
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