Narrator: Witness a theoretical argument, Washington D.C., the present. Four intelligent men talking about an improbable thing like going back in time. A friendly debate revolving around a simple issue: could a human being change what has happened before? Interesting and theoretical because who ever heard of a man going back in time, before tonight, that is. Because this is the Twilight Zone.
Narrator: Mr. Peter Corrigan, lately returned from a place 'back there,' a journey into time with highly questionable results, proving on one hand that the threads of history are woven tightly and the skein of events cannot be undone, but on the other hand, there are small fragments of tapestry that can be altered. Tonight's thesis to be taken as you will, in the Twilight Zone.