Cast
- J.P. Kennedy
- Adm. William Sowden Sims
- Roy Travers
- Capt. von Hagg
- Douglas Herald
- Capt.-Lt. Stockmar - U-Boat 24
- Jack McEwan
- Ober-Lt. Schwartz - U-Boat 24
- Earl Jellicoe
- Self - Admiral of the Fleet John Rushworth Jellicoe
- Harold Auten
- Self - Lt. Cdr. Harold Auten
