Watch Kingdom of Saturn: Cassini's Epic Quest

It will rank as one of the greatest space missions of all time. On its way to Saturn, the Cassini spacecraft travelled nearly four billion kilometers, delivered a probe to a toxic moon, discovered phantasmagorical structures on the planet's icy rings and studied the startling atmosphere on a tiny moon. NASA ended the mission in a daring spiral dive into Saturn's atmosphere. Its legacy will endure.

Kingdom of Saturn: Cassini's Epic Quest is a 2017 documentary with a runtime of 52 minutes. It has received mostly positive reviews from critics and viewers, who have given it an IMDb score of 7.4.