- Anthony D. Call
- Self - Narrator
- Joe Hoyt
- Self - Expedition Leader, Maritime Archaeologist
- John Wagner
- Self - Maritime Archaeologist
- Guenther Degen
- Self - on of U-Boat Captain
- Bob Wallace
- Self - Captain, SRVx
- John Bright
- Self - Maritime Archaeologist
- William Kurdi
- Self - United States Merchant Marine
- Issie Deitsch
- Self - United States Merchant Marine
- Euphemia Ennis
- Self - Local Resident Witness
- Earl O'Neal
- Self - Local Resident Witness
- James Delgado
- Self - Director of Maritime Heritage
- Evan Kovacs
- Self - Technical Diver
- Becky Kagan Schott
- Self - Technical Diver
- Gerhard Weinberg
- Self - WWII Military Historian
- Eric Diaddorio
- Self - Captain, Cutting Edge
- Rich Stevenson
- Self - Technical Diver
- John Kloske
- Self - Manager of Operations, SRI International
- Peter Muggleworth
- U-Boot Captain
- John Pycior
- Captian Johansen
- Zach Steffey
- German Submariner
- J.D. Wine
- Nazi Chief Officer
