Twilight Zone Third Season

"Missing: one frightened little girl. Name: Bettina Miller. Description: six years of age, average height and build, light brown hair, quite pretty. Last seen being tucked in bed by her mother a few hours ago. Last heard - aye, there's the rub, as Hamlet put it. For Bettina Miller can be heard quite clearly, despite the rather curious fact that she can't be seen at all. Present location? Let's say for the moment - in the Twilight Zone."

Tina Miller rolls under her bed and disappears. Her father calls a friend, Bill, a physicist. The family dog runs under the bed and disappears also. Bill believes Tina fell through a hole into another dimension. Chris Miller puts his arm through the wall trying to grab hold of Tina. He falls forward and halfway through the hole. He sees a twisted, distorted world. He calls the dog, who then leads Tina to him. He grabs them both and Bill pulls all three back through the hole, which then closes. Bill says, "Another few seconds and half of you would have been here, and the other half...."

"The other half where? The fourth dimension? The fifth? Perhaps. They never found the answer. Despite a battery of research physicists equipped with every device known to man, electronic and otherwise, no result was ever achieved, except perhaps a little more respect for and uncertainty about the mechanisms of the Twilight Zone."