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Time Travel in the Grand Canyon

What does this geological wonder reveal about North America’s deep history?
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Clip Season 42 Episode 20 Length 04:33 Premiere: 11/04/15

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signature image of Sam Claflin as Edmond Dantès (the Count) standing with a ship's sail behind him. Tune in and stream informationsignature image of Sam Claflin as Edmond Dantès (the Count) standing on a rock looking back over his shoulder as a wave crashes in front of him. Tune in and stream information

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Specials

Season 42 Episodes

Inside Einstein's Mind
S42 E23 Length 53:07 Premiere Date 11/25/15

Making North America: Origins
S42 E20 Length 53:35 Premiere Date 11/04/15

Secrets of the Ghost Forest
Clip Length 03:07 Premiere Date 07/02/17

Making North America: Origins Preview
Preview Length 00:30 Premiere Date 11/04/15

Time Travel in the Grand Canyon
Clip Length 04:33 Premiere Date 11/04/15

A Labyrinth of Lava
Clip Length 01:18 Premiere Date 10/27/15

Animal Mummies Preview
Preview Length 00:30 Premiere Date 10/22/15

Sea Level Rise: When 1 in = 2 ft
Clip Length 02:42 Premiere Date 10/20/15

Digital Domain of Warfare
Clip Length 01:56 Premiere Date 10/13/15

CyberWar Threat Preview
Preview Length 00:30 Premiere Date 10/07/15

The Power of the Flood Myth
Clip Length 03:32 Premiere Date 09/29/15

Making North America Sneak Peek
Preview Length 04:03 Premiere Date 08/30/15

Space Pics That Amaze Scientists
Clip Length 02:52 Premiere Date 08/24/15

Ghosts of Subatomic Particles
Clip Length 01:42 Premiere Date 03/17/15

Invisible Universe Revealed Preview
Preview Length 00:30 Premiere Date 03/03/15

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Your Brain: Perception Deception - S50 E9

Join neuroscientist Heather Berlin on a quest to understand how your brain shapes your reality, and why you can't always trust what you perceive. Learn the surprising tricks and shortcuts the brain takes to help us survive.

  • Wednesday April 1, 2026 9:00 pm ET on KET
  • Wednesday April 1, 2026 8:00 pm CT on KET
  • Thursday April 2, 2026 5:00 pm ET on KET
  • Thursday April 2, 2026 4:00 pm CT on KET
  • Friday April 3, 2026 2:00 am ET on KET
  • Friday April 3, 2026 1:00 am CT on KET
  • Sunday April 5, 2026 7:00 pm ET on KET2
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  • Tuesday April 7, 2026 1:00 am ET on KET2
  • Tuesday April 7, 2026 12:00 am CT on KET2

Your Brain: Who's in Control? - S50 E10

Dive into the latest research on the subconscious to see what's really driving the decisions you make.

  • Wednesday April 8, 2026 9:00 pm ET on KET
  • Wednesday April 8, 2026 8:00 pm CT on KET
  • Thursday April 9, 2026 5:00 pm ET on KET
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  • Sunday April 12, 2026 7:00 pm ET on KET2
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  • Tuesday April 14, 2026 1:00 am ET on KET2
  • Tuesday April 14, 2026 12:00 am CT on KET2

Athens: Birth of Democracy - S53 E7

Archaeologists investigate the dramatic origins of democracy in ancient Greece 2,500 years ago. Mass graves and ancient ruins where tyrants were murdered shine new light on the birth of a revolutionary form of government.

  • Wednesday April 15, 2026 9:00 pm ET on KET
  • Wednesday April 15, 2026 8:00 pm CT on KET
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  • Friday April 17, 2026 1:00 am CT on KET
  • Sunday April 19, 2026 7:00 pm ET on KET2
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  • Tuesday April 21, 2026 1:00 am ET on KET2
  • Tuesday April 21, 2026 12:00 am CT on KET2

Rain Bombs - S53 E5

Scientists race to understand catastrophic weather events known as "rain bombs" and how we can protect ourselves from their growing power.

  • Wednesday April 22, 2026 9:00 pm ET on KET
  • Wednesday April 22, 2026 8:00 pm CT on KET
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  • Tuesday April 28, 2026 1:00 am ET on KET2
  • Tuesday April 28, 2026 12:00 am CT on KET2

Return to the Moon - S53 E8

Follow the Artemis II engineers and crew on a perilous 10-day journey to orbit the Moon.

  • Wednesday April 29, 2026 9:00 pm ET on KET
  • Wednesday April 29, 2026 8:00 pm CT on KET
  • Thursday April 30, 2026 5:00 pm ET on KET
  • Thursday April 30, 2026 4:00 pm CT on KET
  • Friday May 1, 2026 2:00 am ET on KET
  • Friday May 1, 2026 1:00 am CT on KET
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Baltimore Bridge Collapse - S52 E6

  • Tuesday March 31, 2026 5:00 am ET on KET2
  • Tuesday March 31, 2026 4:00 am CT on KET2
  • Tuesday March 31, 2026 12:00 am ET on KET2
  • Monday March 30, 2026 11:00 pm CT on KET2
  • Sunday March 29, 2026 7:00 pm ET on KET2
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  • Friday March 27, 2026 2:00 am ET on KET
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  • Wednesday March 25, 2026 9:00 pm ET on KET
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Pompeii's Secret Underworld - S52 E5

  • Tuesday March 24, 2026 5:00 am ET on KET2
  • Tuesday March 24, 2026 4:00 am CT on KET2
  • Tuesday March 24, 2026 12:00 am ET on KET2
  • Monday March 23, 2026 11:00 pm CT on KET2
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The Planets: Mars - S46 E13

  • Thursday March 12, 2026 4:30 pm ET on KET
  • Thursday March 12, 2026 3:30 pm CT on KET

Stone Age Temple Mystery - S53 E6

  • Tuesday March 3, 2026 5:00 am ET on KET2
  • Tuesday March 3, 2026 4:00 am CT on KET2
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  • Monday March 2, 2026 11:00 pm CT on KET2
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