The picture isn't quite big enough to read clearly, so here's the rundown:
"He breaks his glasses." (Time Enough at Last)
"There really is something on the wing." (Nightmare at 20,000 Feet)
"There are two aliens, and he's one of the them." (Will the Real Martin Please Stand Up?)
Row 2, left to right:
"It's a cookbook." (To Serve Man)
"Everyone else is ugly." (Eye of the Beholder)
"The pocket watch breaks." (A Kind of a Stopwatch)
Row 3, left to right:
"The masks deform their faces." (The Masks)
"She's a mannequin, too." (The After Hours)
"They're astronauts from Earth." (The Invaders)
I also love the fact that "The Twilight Zone" doesn't actually appear anywhere on the shirt. If you're cool, you'll just know.
You can get yours here.