Last night we said farewell to the Star Wars quoting machine that was 30 Rock. It was sad, beautiful and mind blowing — and the series finally revealed that Kenneth the Page is an immortal. Check it out!
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I'm fairly sure the joke is that Kenneth just ages really well. Wast here ever a reference to something like this through the course of the series? I get the impression it was some call back like the others made during the episode.