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Schedule Highlights August 1 to August 7

From the earliest days of flight, the royal family has traveled in style; the inside story of five-star regal luxury at 30,000 feet on Secrets of Royal Travel Secrets of the Royal Flight at 7 p.m. Sunday.

Cassie and Sunny discover Walsh was chased by all four suspects on the night in question; Willets realizes Fiona's blood sample may have been deliberately lost by Liz on Masterpiece Unforgotten at 8 p.m. and 11 p.m. Sunday & 11:25 p.m. Saturday.

Professor T helps investigate the disappearance of a 6-year-old girl; tensions rise between Paul Rabbit and Professor T on Professor T Mother Love at 9 p.m. Sunday & 10:25 p.m Saturday.

A squire (Geoffrey Bateman) seeks Poirot's (David Suchet) help against threats to kidnap his son on Poirot The Adventure of Johnnie Waverly at 10 p.m. Sunday.

Exploring the lives of the Black, homeless queer and trans youth who call New York's Christopher Street Pier their home on POV Pier Kids at 9 p.m. Monday.

One in 52 players from Kinston, N.C., make it to the NBA — the most per capita in the world on Something in the Water: A Kinston Basketball Story at 10:30 p.m. Monday.

Actress S. Epatha Merkerson and television host Michael Strahan discover unexpected details about their families on Finding Your Roots With Henry Louis Gates, Jr. Freedom Tales at 7 p.m. Tuesday.

Muhammad Ali's boxing successes, conversion to Islam, Parkinson's disease and his re-emergence at the Atlanta Olympic Games on In Their Own Words Muhammad Ali at 8 p.m. Tuesday.

The 1938 world heavyweight championship between Joe Louis and German boxer Max Schmeling on American Experience The Fight at 9 p.m. Tuesday.

A curated selection of episodes from Professional Black Girl, a web series covering everyday topics from hairstyles to personal fashion on Afropop: The Ultimate Cultural Exchange Professional Black Girl at 10 p.m. Tuesday.

How big cats survive and thrive around the globe, from the solitary bachelor snow leopard in the Himalays to the swamp tiger of South Asia on Nature Super Cats: Cats in Every Corner at 7 p.m. Wednesday.

High-action experiments and 3-D technology provide insight into how China's terracotta army was made on NOVA Emperor's Ghost Army at 8 p.m. Wednesday.

Swedish archaeologists prove through a DNA study that remains found in the burial chamber of a Viking warrior in 1878 are that of a woman — not a man on Secrets of the Dead Viking Warrior Queen at 9 p.m. Wednesday.

This long-running concert series features artists from every musical genre in a live-music setting on Austin City Limits at 10 p.m. Wednesday & Friday.

Overheard With Evan Smith celebrates 10 years with comments from entertainers who appeared on the show on Overheard With Evan Smith at 7 p.m. Thursday.

Exploring Austin's growing homeless population and possible lasting solutions on ATX Together Homeless in Austin at 7:29 p.m. Thursday.

The Bullock Texas State History Museum; retracing the events of the Texas Revolution on The Daytripper Texas Revolution Road Trip at 8 p.m. Thursday.

It's Christmas and new detective Charlie Nelson moves into Midsomer, where he's thrown straight into an intriguing mystery in the village of Morton Shallows — a man is fatally stabbed with an antique sword during a ghost-hunting party at a haunted manor house on Midsomer Murders The Christmas Haunting at 8:30 p.m. Thursday.

Indianapolis radio personalities Ann Craig-Cinnamon and John Cinnamon's 16-day travel adventure from Moscow to Beijing on the Trans-Siberian Railway — the world's longest train ride on Journey on the Trans-Siberian Railway at 10:01 p.m. Thursday.

Searching the Patuxent River for the USS Scorpion, the lost flagship of Commodore Joshua Barney's Chesapeake Bay Flotilla on The Search for the USS Scorpion at 10:30 p.m. Thursday.

Cheech Marin's support of the Chicano Art Movement and his journey to develop the Cheech Marin Center for Chicano Art, Culture and Industry on The Cheech at 7:30 p.m. Friday.

Photographers who shot some of the most memorable front covers in music photography reveal the unknown stories behind these iconic photographs on Icon: Music Through the Lens On the Cover at 8 p.m. Friday.

A look at Pink Floyd's Dark Side of the Moon includes interviews with Roger Waters, David Gilmour, Richard Wright and Nick Mason on Classic Albums Pink Floyd — Dark Side of the Moon at 9 p.m. Friday.

Trombone Shorty & Orleans Avenue perform with special guest Cyril Neville on Austin City Limits at 7 p.m. Saturday.

Dr. Sharma comes up with a plan to diagnose the miners' health problems; an unusual van arrives in the village and the driver, a rugby player, creates a real stir; the doctor's luck may be changing for the better on The Indian Doctor The Van at 8 p.m. Saturday.

Murder is no laughing matter when Father Brown visits a jesters convention on Father Brown The Wisdom of the Fool at 8:45 p.m. Saturday.

An autopsy helps Hercule Poirot establish that a man did not die of natural causes on Poirot Four and Twenty Blackbirds at 9:31 p.m. Saturday.

Schedule Highlights from Previous Weeks