What's happening?

Cosmos: A Personal Voyage: 1x4

Heaven and Hell

A descent through the hellish atmosphere of Venus to explore its broiling surface serves as a warning to our world about the possible consequences of the increasing greenhouse effect. Then Dr. Sagan leads us on a tour of our solar system to see how other heavenly bodies have suffered from various cosmic catastrophes.

Cosmos: A Personal Voyage: Season 1 Episode 4
Oct. 19, 1980