Peter and Bobby believe they are seeing a UFO, which actually is part of an elaborate hoax being played by Greg. The trick backfires though when Peter and Bobby take pictures, which lead to a government investigation.

Cast: Robert Reed, Florence Henderson, Ann B. Davis, Maureen McCormick, Eve Plumb, Susan Olsen, Barry Williams, Christopher Knight, Mike Lookinland, Jim McDivitt, Mario Machado, James Flavin, Frank Delfino, Sadie Delfino