89 mins | War | June 23, 1969
89 mins | War | June 23, 1969
| IMDb rating | 5.3 |
| Producers | The Mirisch Corporation |
| Original title | Submarine X-1 |
| Directors | William A. Graham |
| Writers | John C. Champion, Guy Elmes, Donald S. Sanford, Edmund H. North |
as Cmdr. Richard Bolton, RNVR
as Lt. Davies R.N.V.R
as Sub-Lt. Pennington, RN
as Leading Seaman Quentin
as CPO Barquist X 3
as Lt. Robert Talbot Gogan R.N.R.
as Sub-Lt. Keith Willis, RNVR
as CPO Boker Knowles
as Sub-Lt. X-3
as CPO Norman Kennedy
as Leading Seaman X-2
as Leading Seaman X-1
as Capt. Erlich of the 'Lindendorf'
as Vice Admiral Redmayne (uncredited)