Guest Stars Mark Milner as Himself (Mark Milner - Canadian Military Historian) Warren Kimball as Himself (Warren Kimball - Rutgers University) Werner Hirschmann as Himself (Werner Hirschmann - Former Chief Engineer of U-190) Ken Hansen as Himself (Ken Hansen - Dalhousie University) Andrew Lambert as Himself (Professor of King's College London) Peter Petersen as Himself (Engineer of U-518) Ralph Hennessy as Himself (Ralph Hennessy - Former Royal Canadian Navy) Brian Clarke as Himself (Brian Clarke - Former Merchant Seaman) Terrence Bulloch as Himself (RAF Bomber Pilot) Reinhard Hardegen as Himself (Former Ace Commander of U-123) Ken Ramsden as Himself (Royal Artillery, SS Cyclops) Geoff Smith as Himself (Sonar Operator of HMCS Arrowhead) Cullis Lancaster as Himself (HMCS Moose Jaw Seaman)
