Catalyst: The link between fruit flies and organ regeneration

What if damaged tissues could regenerate new cells? The answer might be found in fruit flies, a creature that has annoyed mankind for eternity.

Catalyst” goes to The Harris Lab to find out the link between the fruit fly and possible tissue and organ regeneration.

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'Endeavour' returns to 'Masterpiece' for more Oxford mysteries

Endeavour Season 5 on Masterpiece

Shaun Evans returns for a fifth season of the popular series as the young Endeavour Morse, before his signature red Jaguar but with his deductive powers already running in high gear. Sundays at 8 p.m., beginning June 24.

Discover stories behind 'Places That Changed America'

10 Places That Changed America

Host Geoffrey Baer takes viewers across the country to tell the stories behind legendary streets, monuments and man-made marvels that changed our country forever.

American Masters presents 'Ted Williams: The Greatest Hitter Who Ever Lived"