Highlights 9/12 to 9/18

When the Master of Gresham College, an amateur astronomer, is found dead at the foot of the University Observatory stairs, Lewis and Hathaway find that the finger of suspicion points at the staff on Masterpiece Mystery at 8 p.m. Sunday.

History Detectives at 8 p.m. Monday explores the truth behind several found objects including a clip of what could be the first talking movie and a section of the first transatlantic cable.

Lafayette: The Lost Hero at 9 p.m. Monday tells the story of the Marquis de Lafayette and his quest to bring democracy to America and France.

Nova presents a comprehensive three-part, three-hour special investigating explosive new discoveries that are transforming the picture of how we became human. Part three, “Becoming Human” unfolds with a forensic investigation into the life and death of hominid ancestors.

Secrets of Shangri-la at 8 p.m. Tuesday tracks remarkable new archaeological discoveries in the world’s highest kingdom.

Filmmaker Deann Borshay Liem (First Person Plural, POV 2000) returns to her native Korea to find her “double,” the mysterious girl whose place she took in America on POV “In the Matter of Cha Jung Hee” at 9 p.m. Tuesday.

A new archeological find outside of Mexico City is turning history on its head as it paints a new picture of the violent relations between the Aztecs and the Conquistadors on Secrets of the Dead at 7 p.m. Wednesday.

Two episodes of the groundbreaking documentary Latin Music USA air back-to-back starting at 8 p.m. Wednesday. Episode Three: Mexican-Americans in CA, TX and across the Southwest create their own distinct musical voices during the second half of the 20th century. Episode Four: Focuses on the Latin Pop explosion of the turn of the century.

Kentucky’s indie rock heroes My Morning Jacket return to the Austin City Limits stage at 10 p.m. Wednesday and 9 p.m. Friday to showcase their acclaimed album Evil Urges.

Journalist Gwen Ifill disuses her career and politics on Texas Monthly Talks at 7 p.m. Thursday and 8:30 p.m. Friday.

Documentary filmmaker Hector Galan fuses live performances, imagery of West Texas and personal stories in this documentary on the band Los Lonely Boys at 8 p.m. Thursday.

The Big Squeeze at 9:30 p.m. Thursday follows 16 year old John Ramirez and other young musicians as they do battle at the statewide accordion throw down.

Rising roots rock kings the Avett Brothers perform songs from their latest album, I and Love and You, on Austin City Limits at 7 p.m. Saturday. Ohio-to-Austin transplants Heartless Bastards follow with their classic rock ‘n’ roll.