Recurring Guest Characters Mark Milner - Canadian Military Historian 4 guest appearances German Naval Association 3 guest appearances Warren Kimball - Rutgers University 3 guest appearances Werner Hirschmann - Former Chief Engineer of U-190 3 guest appearances Frank Scanlon - Former Merchant Seaman 3 guest appearances Ken Hansen - Dalhousie University 3 guest appearances Peter Cock - Former Royal Canadian Navy Seaman 3 guest appearances Professor of King's College London 3 guest appearances Engineer of U-518 3 guest appearances Ralph Hennessy - Former Royal Canadian Navy 2 guest appearances Georg Högel - Former Radio Operator of U30 2 guest appearances John Cannon - Former Seaman of HMS Courageous 2 guest appearances Brian Clarke - Former Merchant Seaman 2 guest appearances RAF Bomber Pilot 2 guest appearances Radio Operator of U-518 2 guest appearances Marianne Young - Athenia Passenger 1 guest appearances Mohamed Rajeh - Former Merchant Seaman 1 guest appearances Charles Gonsalves - Former Merchant Seaman 1 guest appearances Colin Ryder Richardson - War Evacuee 1 guest appearances Günter Heinrich - Former Commandor of U-960 1 guest appearances ⇤ « 1 2 » ⇥