Sunday, June 2 at 7 p.m. — Three young Italian tenors perform in Miami.

Wednesday, May 29 at 11 p.m. — Loreta Velasquez secretly served as a soldier during the Civil War.

Tuesdays in May at 9 p.m.–Peter Sagal breathes new life into the U.S. Constitution.

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Sundays at 10 p.m. — During World War II, they worked undercover at Bletchley Park. Now in the 1950s, they use their code-breaking skills to solve crimes.

Wednesdays at 9 p.m. — Hidden in the red hills of Australia are clues to the mysteries of Earth’s birth, how life arose and how it transformed the planet into the world we now live in.

Tuesday, April 9 at 8 p.m. In the late 1800s, rural southern Oregon was still the rough frontier. It is history that might have faded from memory. But now a rare collection of glass plate negatives brings the era to life.

Wednesday, April 3 at 8 p.m. — Take a journey into the secret world of plants, a landscape of pulsing activity where plants communicate, co-operate and, sometimes, wage all-out war.

Monday, April 1 & Tuesday, April 2 at 9 p.m. — Watch an unforgettable portrait of Robin Charboneau, a 32-year-old, divorced single mother and Oglala Sioux woman living on North Dakota’s Spirit Lake Reservation as she struggles to raise her two children, further her education and heal herself.