I just finished watching Season 1 of "Professor T.", the Belgian police procedural starring Koen De Bouw, which gets better with each episode. De Bouw has a new film coming out this fall "Torpedo", or it may be released in the English-speaking world as "U-235". The movie follows a group of Belgian resistance fighters as they hijack a German submarine. The trailer plays like "The Dirty Dozen", but underwater. The film is multi-lingual (English, Dutch, German) and there are several different trailers. The one on IMDb is subtitled in English while the trailer on YouTube is subtitled in Dutch, but not difficult to follow. Here's a link.
Torpedo Official Trailer