* FridgeBrilliance: The two main humans (in Series 1-4) are Thomas (Crimp) and Richard (Hope). That's Tom, Dick and (old) Harry.
* In the last episode of Season 1, the Professor asks God if humans are the only intelligent species, and God laughs at him, saying "YOU REALLY THINK YOU WERE THE BEST THAT I COULD DO?". While we never actually see any aliens in the series, we do meet at least 4 sentient nonhuman species: angels, demons, dolphins, and a sentient computer.
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