From silent one-man midget subs to U-boats on secret missions, both sides used secret submersibles of all shapes and sizes to conduct clandestine warfare in the war.
| Title | Secret Submarines in WWII |
|---|---|
| Genres | War & Politics Documentary |
| Release Date | |
| Episode Runtime | 01 Hours 00 Minutes |
| Season Number | 4 |
| Episode Number | 9 |
| Production Companies | The DocuMedia Group, The Pearson Television International |
