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Hitler's lost sub originally broadcast on television in 2000 ; Hitler's sunken secret originally broadcast in 2005 ; Great escape originally broadcast in 2004 ; Nazi prison escape originally broadcast in 2001 ; Decoding Nazi secrets originally broadcast in 1999.

Special features include: printable materials for educators; access to the Nova web site.

Hitler's lost sub: production by Lone Wolf Pictures for WGBH/Boston in association with Channel 4 ; written and produced by Rushmore DeNooyer ; directed by Kirk Wolfinger. Hitler's sunken secret: a NOVA production by DOX Productions Ltd. for WGBH/Boston in association with ZDF, Arte and National Geographic Channel International ; produced by David Sington ; directed by Duncan Copp.

The great escape: a Windfall Films production for NOVA/WGBH Boston in association with FIVE, WGBH Educational Foundation ; produced by David Dugan ; written and directed by Mark Radice. Nazi prison escape: a Windfall Films production for NOVA/WGBH and Channel 4 ; written, produced and directed by Jeremy Llewellyn-Jones, Chris Durlacher, Henry Chancellor, Adam English, and Melissa Parker.

Decoding Nazi secrets: a Darlow Smithson production for NOVA/WGBH and Channel 4 ; produced for Darlow Smithson Productions Ltd. by Peter Bate ; executive producer, Paula S. Apsell.

Hitler's lost sub and Nazi prison escape narrator, Roy Scheider.

Decoding Nazi secrets narrator, Liev Schreiber.

Hitler's lost sub: America had just entered World War II, but terrifying unseen weapons were stalking US targets, sinking over 400 ships just miles from American shores in the worst naval defeat in United States History. Hitler's sunken secret: One of the most daring resistance operations of World War II was the 1944 sinking of the Norwegian ferry Hydro, with its cargo of "heavy water" destined for the Nazi's secret atomic bomb project.

The great escape: Over six hundred Allied prisoners banded together to dig three highly sophisticated escape tunnels from the German prison camp Stalag Luft III. Each tunnel was outfitted with railways, electric lights, and even underground air pumps. Nazi prison escape: Colditz Castle in Germany boasted medieval walls 12 feet thick and 100 feet tall, surrounded by double-fenced barbed wire, battlements 75 feet thick, and around-the-clock armed sentries. Reveals the daring schemes and ingenious devices that helped over 300 prisoners attempt breakouts.

Decoding Nazi secrets: In 1940, Europe lay under the Nazi jackboot. German bombers unleashed the blitz against Britain and U-boats decimated the convoys, her only lifelines. Churchill had a secret weapon: a group of American and British mathematicians, crossword fanatics, linguists, and chess champions who decoded an "unbreakable" Nazi device and changed history.

MPAA rating: Not rated.

DVD, region 1, full screen or letterbox presentations; Dolby Digital, NTSC.

Closed-captioned; described videos.