These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
Zeenu might have different hours compared to earth? For all we know, he could've only been gone for an hour and nobody's realized he went missing.
Hilarious in Hindsight\Harsher in Hindsight: In the pilot episode, the alien announcer says, "And now, here's the star of our show (but not for much longer) Sheen!" The show itself was canned after a single season.