From this:

Flying saucers and strange beings who have visited Earth aren't the typical topics reported by Peter Jennings, anchor of ABC's "World News Tonight." Jennings, whose new two-hour special tackles the subject of UFOs, admits he and his production team began the project with doubts and a dose of curiosity...

Segments include visits to the Center for UFO Studies outside Chicago, where files bulge with reports of sightings, and to a radio talk show on "UFOlogy." That show's host, Art Bell, cites among his 18 million weekly listeners "the most informed UFOlogists, the best scientists and some of the craziest people you'll ever meet."

The show will be broadcast this Thursday, on both sides of the Rockies at the same time.