From first season used for episodes "Mr.Denton on Doomsday"(1959),"Mr.Bevis"(1960),"The Mighty Casey"(1960),and "The After Hours"(1960 w/Anne Francis as Marsha White),and the opening goes like this:There is a gray screen,a big eye in the upper left-hand corner,and a line across the screen,eerie pulse pounding music,and Rod Serling's narration that goes as follows:"You are about to enter another dimension.A dimension not only of sight n' sound but of mind.A journey into a wondrous land of imagination(eyelid closes).Next stop-The Twilight Zone".(DING)Very eerie opening.It's too bad thet they abandoned this opening.