When did The Planets and Beyond Season 1 Episode 5 air?
The Planets and Beyond Season 1 Episode 5 aired on September 19, 2017.


The story of the discovery and exploration of the planets, revealing the deepest secrets of our neighbors in space.

Astronaut Mike Massimino investigates the possibility of a giant ninth planet at the edge of the solar system; using the latest technology, he reveals the incredible secrets of this mysterious world.
Direct answers for episode-level questions and details.
The Planets and Beyond Season 1 Episode 5 aired on September 19, 2017.
This episode runs for approximately 43 minutes.
Comments coming soon
Discuss episodes with other viewers