| Episode credited cast: |
 | Tony Robinson | - | Himself - Presenter |
 | Phil Harding | - | Himself (as Dr Phil Harding) |
| Rest of cast listed alphabetically: |
 | Geoff Challinor | - | Himself - Anson Engine Museum |
| Peter Green | - | Himself - HMS Ambush (as Commander Peter Green) |
| Eric Grove | - | Himself - Naval Historian (as Prof Eric Grove) |
| Nick Hewitt | - | Himself - Naval Historian |
| Trevor Lawrence | - | Himself - Explosives Expert |
| George Malcolmson | - | Himself - Royal Navy Submarine Museum |
| Innes McCarthy | - | Himself - Maritime Archaeologist (as Innes McCartney) |
| Axel Niestlé | - | Himself - U-Boat Historian (as Dr Axel Niestlé) |
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