Season 31 aired between 15 Jan 2019 and 10 Sep 2019, 7 episodes.
Episodes
E01
The Swamp
15 Jan 2019
E02
Sealab
12 Feb 2019
E03
Chasing the Moon (1): A Place Beyond the Sky
08 Jul 2019
E04
Chasing the Moon (2): Earthrise
09 Jul 2019
E05
Chasing the Moon (3): Magnificent Desolation
10 Jul 2019
E06
Woodstock: Three Days That Defined a Generation
06 Aug 2019
E07
The Feud
10 Sep 2019