Planet Earth
Caves
TV Flash files “Caves” as hour 4 of 11 in the TV Flash guide — Planet Earth (2006) on BBC/Discovery, season 1, episode 4, aired 2006-03-26, 60 min.
From the desk
How this hour is filed
This leaf is S01E04: listed hour 4 of 11 in the Planet Earth guide, hour 4 of 11 in season 1. It aired 2006-03-26 (60 min). The listed hour before it is “Fresh Water” (S01E03). Next is “Deserts” (S01E05).

Catalog log
Broadcast listing — not a TV Flash recap.
The Cave of Swallows in Mexico is a 400-metre vertical shaft. It's deep enough to engulf the Empire State Building, yet few people even know of its existence. Caves are earth's final frontier and this programmegoes where few have been before. Deer Cave in Borneo is a daytime retreat for five million bats; their droppings support an entire community of creatures. Shine a light on one massive pile of droppings and the whole place shimmers with millions of dung-eating insects. Caves also harbour some of the most remarkable and bizarre animals on earth; from cave swiftlets who build nests out of just saliva to the troglodytic animals that never see daylight or ever set foot on the surface. Troglodytes like the Texas cave salamander and Thailand's cave angel have neither eyes nor pigment, and the entire populations of both are found in just a couple of caves. From Lechuguilla Cave's astonishing six-metre-long crystals to the extraordinary snottites of Villa Luz, this documentary provides unprecedented access to the hidden world of caves.
Viewer FAQ
Where does Caves sit in the Planet Earth guide?
S01E04 is listed hour 4 of 11 — hour 4 of 11 in season 1, season 1 episode 4.
When did Planet Earth S01E04 air?
Caves aired 2006-03-26 and is listed at 60 minutes.
BBC or Discovery version?
BBC Natural History Unit masterpiece; U.S. version aired on Discovery. Attenborough whispering over HD biomes is the event.
In the series
Why this series still plays
David Attenborough whispers over high-definition footage that made Earth look extra-terrestrial in 2006. Planet Earth is natural-history spectacle as appointment awe — biomes as set pieces, how-did-they-film-that making-of lore, the production ceiling every later nature series still jumps for.
The group chat for Planet Earth is just people typing how did they film that until the making-of diaries become the second show, which they kind of are. Alastair Fothergill and the BBC Natural History Unit, David Attenborough whispering, U.S. version on Discovery in 2006: a landmark wildlife series spanning the planet's biomes in then-revolutionary high definition. Earth looking extra-terrestrial. Biomes as set pieces. Awe as a weekly appointment. Eleven episodes, one season, sequels including Planet Earth II.…
Filed against
- David Attenborough as Narrator
David Attenborough whispers Planet Earth into appointment awe — high-definition footage that made the globe look extra-terrestrial in 2006, biomes as set pieces, how-did-they-film-that lore. Natural-history spectacle as a 2000s production…