Nova (1974– )
1 user

The Planets: Inner Worlds 

The rocky planets Mercury, Venus, Earth and Mars all have similar origins, but only one supports life. Was it always this way?




Episode credited cast:
Carrie Anderson Carrie Anderson ... Herself - Scientist, Cassini-Huygens
Nancy Chabot Nancy Chabot ... Herself - Instrument Scientist, Messenger
Brett Denevi Brett Denevi ... Himself - Geologist, Messenger
David Grinspoon David Grinspoon ... Himself - Planetary Science Institute
Jonathan Lunine Jonathan Lunine ... Himself - Scientist, Cassini-Huygens
Larry Nittler Larry Nittler ... Himself - Deputy Lead, Messenger
Lynnae Quick Lynnae Quick ... Herself - Smithsonian National Air and Space Museum
Zachary Quinto ... Narrator
Lynn Rothschild Lynn Rothschild ... Herself - NASA in Silicon Valley
Suzanne Smrekar Suzanne Smrekar ... Herself - NASA Jet Propulsion Laboratory
Anjali Tripathi Anjali Tripathi ... Herself - Harvard University


The rocky planets Mercury, Venus, Earth and Mars all have similar origins, but only one supports life. Was it always this way?

Plot Summary | Add Synopsis





Official Sites:

Official site





Release Date:

24 July 2019 (USA) See more »

Company Credits

Show more on IMDbPro »

Technical Specs




Aspect Ratio:

16:9 HD
See full technical specs »

Frequently Asked Questions

This FAQ is empty. Add the first question.

User Reviews

Also Known As,...
27 July 2019 | by pidstrSee all my reviews

This episode is a Re-Narrated version of the 2019 Brian Cox series 'Planets' episode titled "A Moment in the Sun" There's considerable alteration to the script used, with a more sensationalist emphasis in the narration - beautifully read in dramatic voice by Zachary Quinto - no doubt to match the US audience target demographics, rather then the wide-eyed-wonder pitch used in the BBC program for the rest of the world. Some elements also seem to be dumbed down a little from the script used by Dr Cox, and all of his appearances as presenter are removed. Overall, this is a good target-specific program, no doubt appropriate for use in US schools, but is a somewhat paler shadow of the standout original. This one is highly enjoyable, but if you can find the BBC version in your feeds, watch that instead.

3 of 4 people found this review helpful.  Was this review helpful to you? | Report this
Review this title | See one user review »

Contribute to This Page

Free Movies and TV Shows You Can Watch Now

On IMDb TV, you can catch Hollywood hits and popular TV series at no cost. Select any poster below to play the movie, totally free!

Browse free movies and TV series

Stream Trending TV Series With Prime Video

Explore popular and recently added TV series available to stream now with Prime Video.

Start your free trial

Recently Viewed