Marie Osmond joins as host in the 4th season opener. Segments include Famous faces adorn U.S. currency; hypnotism in dental science; Hugo Ball Dadaism poetry; sound poets The Four Horsemen (poetry) in Toronto; Marfortadowg (festival of free screaming) in Italy; NASA Space Training Center and Manned Maneuvering Unit in Denver; Kevin Clarke and the 5-year photographic journey of a red couch across America;[12] Thailand chef Klinmahon.

An Italian inventor who bilked the French government of $100 million; a Japanese game show that tests contestants courage; automobile safety equipment; scientific technology to aid the disabled; a man who collects junk mail; a woman who designed a Victorian mansion from her dreams and nightmares: The Winchester Mystery House; a windmill restorer.

Segments include the dead-letter office of the New York General Post Office; how postage stamps helped make Hitler a millionaire; unusual bronzed mementos; a London shoe store that requires an appointment for fitting; the hay-fever helmet; a boy born with no immune system ; a car shredder.

Included: a musical number that can be performed by anyone on any instrument (John Cage's 4′33″); a fatal downbeat struck by orchestra conductor Jean-Baptiste Lully; Karma Dzong, a Buddhist shrine in Boulder, Colorado; Tibet; performance art (Tehching Hsieh); sculptor Duane Hanson; the development of commercial aviation; aircraft safety; an autopsy performed on a 2500-year-old corpse.

- Go for an underwater swim with a deep-diving daredevil dog - Get inside a computerized car in France you can operate with the sound of your voice - Witness the spectacular development of aircraft carriers from early experiments to current operations - Take a tour with a New York artist who has transformed a car into a traveling art exhibit - Become a moving target for a photographer who keeps pigeons as working partners - Trigger a computerized weapon that fills the sky with a curtain of explosive steel - Share one of the world's most unusual and unsuccessful artistic statements

Segments on how a gallery owner sparked public interest in an ignored painting; mud-bog racing; motorists who pray at the Temple of Safe Driving in Japan; the Franklin alphabet; miniature artwork; British Royal Marine basic training; a mystic artist; restoration of Leonardo's "Last Supper."

A 75-year-old fake newspaper story that caused a Texas town to be torn apart; using hypnotism to control and prevent pain; a thermography machine; Arabian courtship customs; George Willig's illegal climb up the outside of the World Trade Center; rock climbing without equipment; cliff parachuting; an 18-year-old deaf woman studying to be a musician; the Leaning Tower of Pisa.

Segments include the "best-kept secret" of World War II; medicines derived from plants and insects; acupressure therapy; Buddhist monks of the Mount Koya monastery in Japan; altering the body's internal biological clock; a monument to a war hero who became a turncoat; the Corn Palace in Mitchell, South Dakota; a man who dives for golf balls lost in water hazards.