Anthology series help!!!?

I know it's not Twilight Zone, And only one episode stands out in my mind. It's the 100th (or so) anniversary of a time probes journey into the future. Seeing probe footage of a clean future spurred the people of the past to clean up the environment. But the last remaining scientist from the time probe experiment confesses to a reporter that the probe was a fake and the footage was just stock footage meant to trick the world into action.