Crop circles spotted on an island in the Mediterranean might not be from aliens, but from a threat closer to home: Nazis; new discoveries help experts uncover who made them and for what sinister purpose.
| Name | Type | Role | |
|---|---|---|---|
| Carey Dunn | Producer | Series Producer | |
| Roland Kays | Guest Star | Self - Biologist | |
| Adam Ruben | Guest Star | Self - Science Journalist | |
| David Krueger | Guest Star | Self - Historian | |
| Kevin Hymel | Guest Star | Self - Military Historian | |
| Mallory Lindsay | Guest Star | Self - Conservationist | |
| Ken Joyce | Guest Star | Self - Image Analyst, Maxar Technologies | |
| Karen Bellinger | Guest Star | Self - Archaeologist | |
| Geoffrey 'Geoff' Wawro | Guest Star | Self - Military Historian | |
| Joe Watkins | Guest Star | Self - Anthropologist | |
| Eleanor Spicer Rice | Guest Star | Self - Zoologist | |
| Klint Janulis | Guest Star | Self - Archaeologist | |
| Katie Paul | Guest Star | Self - Anthropologist | |
| Mark Horton | Guest Star | Self - Archaeologist | |
| Tracy Fanara | Guest Star | Self - Research Scientist | |
| Martin Pepper | Guest Star | Self - Geologist | |
| Rob Nelson | Guest Star | Self - Biologist | |
| Alan Lester | Guest Star | Self - Geologist | |
| Jennifer Lee Jellicorse | Guest Star | Self - History Communicator | |
| Guy Walters | Guest Star | Self - Author & Historian | |
| Nick Patterson | Executive Producer | ||
| Neil Laird | Executive Producer | for SCIENCE | |
| Martin Durkin | Executive Producer |