You are about to enter another dimension...[The Twilight Zone fansite/fanlisting]

"You unlock this door with the key of imagination. Beyond it is another dimension - a dimension of sound, a dimension of sight, a dimension of mind. You're moving into a land of both shadow and substance, of things and ideas. You've just crossed over into the Twilight Zone."

Twilight Zone Quotes

(Opening narration season 1)
"There is a fifth dimension beyond that which is known to man. It is a dimension as vast as space and as timeless as infinity. It is the middle ground between light and shadow, between science and superstition, and it lies between the pit of man's fears and the summit of his knowledge. This is the dimension of imagination. It is an area which we call the Twilight Zone."

(Opening narration season 1 alternate)
"You are about to enter another dimension, a dimension not only of sight and sound but of mind. A journey into a wondrous land of imagination. Next stop, the Twilight Zone!"

(Opening narration season 2)
"You're traveling through another dimension, a dimension not only of sight and sound but of mind. A journey into a wondrous land whose boundaries are that of imagination. That's the signpost up ahead - your next stop, the Twilight Zone!"

(Opening narration season 3)
"You are traveling through another dimension, a dimension not only of sight and sound but of mind. A journey into a wondrous land of imagination. Next stop, the Twilight Zone!"

(Opening narration season 4 & 5)
"You unlock this door with the key of imagination. Beyond it is another dimension - a dimension of sound, a dimension of sight, a dimension of mind. You're moving into a land of both shadow and substance, of things and ideas. You've just crossed over into the Twilight Zone."

(Ep 1.8 "Time Enough At Last")
Henry Bemis: And the best thing, the very best thing of all, is there's time now... there's all the time I need and all the time I want. Time, time, time. There's time enough at last.
[Henry goes to pick up a book, but in doing so his glasses fall off and break. He slowly raises his glasses to his face, seeing they are completely broken]
Henry Bemis: That's not fair. That's not fair at all. There was time now. There was, was all the time I needed...

(Ep 2.29 "The Obsolete Man")
Subaltern: [like a robot] "You have disgraced the State before the masses. You have proven yourself a hypocrite, and a traitor to the ideals of the State; you have, as such, no function. You are OBSOLETE."

(Ep 3.33 "The Dummy")
Narrator: What's known in the parlance of the times as the old switcheroo, from boss to blockhead in a few easy lessons. And if you're given to nightclubbing on occasion, check this act. It's called Willie and Jerry, and they generally are booked into some of the clubs along the 'Gray Night Way' known as the Twilight Zone.