
William Lyman (born May 20, 1948) is an American actor. Being known for his polished, resonant voice, Lyman has narrated the PBS series Frontline since its second season in 1984 and played William Tell in the action/adventure television series Crossbow.
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How did PFAS chemicals once used in popular stain-resistant carpets end up in the water and environment in parts of Georgia, Alabama and South Carolina? FRONTLINE, The Associated Press, The Atlanta Journal-Constitution, The Post and Courier and AL.com investigate what happened with these forever chemicals and the ongoing health impacts. The joint investigation draws on thousands of pages of documents and court depositions and interviews with former regulators and industry insiders, as well as doctors, scientists and people who have the kinds of illnesses that researchers have linked to PFAS contamination.

Three months after President Donald Trump returned to office in 2025 and began his major immigration crackdown, he held a White House sit-down with a popular Latin American leader who had once called himself the world's coolest dictator. As the documentary explores, Bukele opened the doors of the notorious Salvadoran prison known as CECOT to planeloads of mostly Venezuelan U.S. deportees that the Trump administration had swept up and accused of being gang members. Later reporting would reveal that most of the men had no criminal convictions in the U.S. or proven gang affiliations.

Rubio. Vance. Wiles. Gabbard. Hegseth. Miller. These are some of the key players behind President Donald Trump's expansive use of the U.S. military. FRONTLINE examines the inner circle of advisors and officials trying to project U.S. power, from clashes with allies, to taking out foreign leaders, to waging war in the Middle East. • "The War Cabinet"

An orphaned teen hits the road with a mysterious robot to find her long-lost brother, teaming up with a smuggler and his wisecracking sidekick.

A grief-stricken arborist and her son awaken a haunting when they begin felling trees at the estate of a mysterious recluse.

FRONTLINE investigates China’s rule over Tibet. With footage from inside the region, the documentary examines how the Communist regime controls Tibet’s Buddhist population, and the battle over the succession of its spiritual leader, the Dalai Lama.

Tracing the dramatic and controversial rise of Robert F. Kennedy Jr., FRONTLINE examines how the scion of a storied dynasty endured tragedy and scandal, broke with the Democratic Party and his family, stoked conspiracy theories, and is reshaping government and public health.

FRONTLINE goes inside the high-stakes showdown between President Donald Trump and the courts over presidential power. Trump allies, opponents and experts talk about how he is testing the extent of his power; the legal pushback; and the impact on the rule of law.

A returning war veteran, stricken with PTSD, gets trapped with his teenage sister on Boston's Tobin Memorial Bridge when a heavily armed group of ex-military revolutionaries take everyone hostage.

FRONTLINE investigates the roots of the criminal cases against former President Trump stemming from his 2020 election loss. With the presidential race for 2024 underway, veteran political filmmaker Michael Kirk and his team examine the House Jan. 6 committee’s evidence, the historic charges against Trump and the threat to democracy.
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