This was a fantastic series about U.S. Navy Submarines in WWII. It starred the regular TV actors of the the day and each episode was based on fact. Also the host often had the real people of the story on at the end of an episode to get their comments. It was great history and weekly entertainment. It really should be brought out on DVD both for those of us that remember it and to preserve television history itself. The combination of real footage and actors on the submarine set seemed pretty seamless to me but then I couldn't have been more than 6 or 7 years old when it was on TV. I just know that it is one of the shows I remember quite well from that period. It was entertaining but was obviously done more for telling the history than 'entertaining' people. For me that was more than enough.