Wow! ...TZ is the ONLY show I've seen every episode of..I hate television, but something about twilight zone is amazing (to me).
The Shatner one is "Nightmare at 20 000 feet" or something, with the gremlin on the plane. They re-did it in the movie.
There are a few I like.
"Time Enough At Last" is the man who works in a bank, but never has enough time to read, because his boss/wife/etc don't let him. Then he's in the vault getting something, the door shuts, and an atomic war wipes out everyone. When he gets out, he has all the time in the world to read ... except for the patented tz-twist at the end (definitely rings true for me, too .. i love to read)
Also, I don't recall the name, but the one where one man bets another that he can't be silent for a year. When the year ends, the other man doesn't have the money to finish on the bet. Again, great ending.
They're all really good, though ... "To Serve Man" is good, check out the Damon Knight story (original).