Plot

In order to provide information for the first air raid over Tokyo, a U.S. submarine sneaks into Tokyo Bay and places a spy team ashore.

Made during World War II, this chronicles a voyage of a U.S. submarine on a secret mission to the very shores of Japan. Much of the film is spent developing the cast of characters that populate the sub.—John Vogel <jlvogel@comcast.net>

The U.S.S. Copperfin sails under secret orders for Tokyo Bay in the early days of World War II. The submarine's mission is to enter the bay undetected and place a landing party ashore to obtain information vital to the upcoming Doolittle air raid on Tokyo.—Jim Beaver <jumblejim@prodigy.net>

During World War II, Captain Cassidy and his crew of submariners are ordered into Tokyo Bay on a secret mission. They are to gather information in advance of the planned bombing of Tokyo. Along the way, the crew learn about each other as they face the enemy and some of them lose their lives. After getting the information they need,they face the harrowing task of getting free once their presence is discovered.—garykmcd