About this programme
Rob Nelson hunts for a mass grave that could expose a dark secret. Plus, a giant lake is mysteriously disappearing and Rob set off to find out why.
Programme listing
Secrets Underground
America's Buried Massacre
Channel
Discovery .Science
Discovery .Science
Starts
Wed 28 Oct 2026, 04:00
Wed 28 Oct 2026, 04:00
Ends
Wed 28 Oct 2026, 05:00
Wed 28 Oct 2026, 05:00
Category
News & Documentary
News & Documentary
When is Secrets Underground next on TV?
Secrets Underground is on now on Discovery .Science and ends at 05:00.
What channel is Secrets Underground on?
The next showing is on Discovery .Science.
Is Secrets Underground on TV tonight?
Yes — it is on tonight at 21:00 on Discovery .History, ending at 22:00.
Know when it’s back on
Create a free TVGuideUK account and set reminders for Secrets Underground, series links and favourite channels — handy when you found us by searching what time it’s on.
What channel?
Discovery .Science
Discovery .Science
Start time
04:00
04:00
Ends
Wed 28 Oct 2026, 05:00
Wed 28 Oct 2026, 05:00
Channel numbers
SkySky Q / Satellite167Channel numbers may vary by region, package or device.
Other airings
Fri 23 Oct
22:00Secrets Underground
American StonehengeDiscovery .ScienceMon 26 Oct
13:00Secrets Underground
American StonehengeDiscovery .ScienceMon 26 Oct
14:00Secrets Underground
Mystery Of The Serpent MoundDiscovery .ScienceTue 27 Oct
04:00Secrets Underground
American StonehengeDiscovery .ScienceTue 27 Oct
05:00Secrets Underground
Mystery Of The Serpent MoundDiscovery .ScienceTue 27 Oct
13:00Secrets Underground
America's Buried MassacreDiscovery .ScienceTue 27 Oct
14:00Secrets Underground
Rocky Mountain MonstersDiscovery .ScienceTue 27 Oct
21:00Secrets Underground
Legend Of The Nazi GoldDiscovery .HistoryTue 27 Oct
22:00Secrets Underground
Legend Of The Nazi GoldDiscovery .History+ 1Wed 28 Oct
05:00Secrets Underground
Rocky Mountain MonstersDiscovery .ScienceWed 28 Oct
13:00Secrets Underground
California's Hidden DoomsdayDiscovery .ScienceWed 28 Oct
14:00Secrets UndergroundDiscovery .Science
22:00Secrets Underground
American StonehengeDiscovery .ScienceMon 26 Oct
13:00Secrets Underground
American StonehengeDiscovery .ScienceMon 26 Oct
14:00Secrets Underground
Mystery Of The Serpent MoundDiscovery .ScienceTue 27 Oct
04:00Secrets Underground
American StonehengeDiscovery .ScienceTue 27 Oct
05:00Secrets Underground
Mystery Of The Serpent MoundDiscovery .ScienceTue 27 Oct
13:00Secrets Underground
America's Buried MassacreDiscovery .ScienceTue 27 Oct
14:00Secrets Underground
Rocky Mountain MonstersDiscovery .ScienceTue 27 Oct
21:00Secrets Underground
Legend Of The Nazi GoldDiscovery .HistoryTue 27 Oct
22:00Secrets Underground
Legend Of The Nazi GoldDiscovery .History+ 1Wed 28 Oct
05:00Secrets Underground
Rocky Mountain MonstersDiscovery .ScienceWed 28 Oct
13:00Secrets Underground
California's Hidden DoomsdayDiscovery .ScienceWed 28 Oct
14:00Secrets UndergroundDiscovery .Science
Previous TV airings
Selected past broadcasts with their original date, time and channel details.
Mon 12 Oct 2026
11:00Secrets UndergroundDiscovery .History+ 1Mon 12 Oct 2026
10:00Secrets UndergroundDiscovery .HistoryMon 12 Oct 2026
10:00Secrets Underground
Lost Pirate City Of TreasureDiscovery .History+ 1Mon 12 Oct 2026
09:00Secrets Underground
Lost Pirate City Of TreasureDiscovery .HistoryFri 9 Oct 2026
11:00Secrets Underground
Mystery Of The Ice CaveDiscovery .History+ 1
11:00Secrets UndergroundDiscovery .History+ 1Mon 12 Oct 2026
10:00Secrets UndergroundDiscovery .HistoryMon 12 Oct 2026
10:00Secrets Underground
Lost Pirate City Of TreasureDiscovery .History+ 1Mon 12 Oct 2026
09:00Secrets Underground
Lost Pirate City Of TreasureDiscovery .HistoryFri 9 Oct 2026
11:00Secrets Underground
Mystery Of The Ice CaveDiscovery .History+ 1