The play originally opened in a small theater in Hollywood, CA, in late September 1942, with the title "Cry Havoc". It opened on Broadway in New York City on 25 December 1942 with the title "Proof Through the Night", but changed the title back to "Cry Havoc" on 30 December 1942, probably because of bad notices. However, it closed on 2 January 1943 after only 11 performances. The opening night cast included Carol Channing and Ann Shoemaker.
The title is from William Shakespeare's "Julius Caesar." "Cry 'Havoc,' and let slip the dogs of war." It's part of Marc Antony's speech that begins with "Friends, Romans, countrymen--lend me your ears."
This film received its USA television premiere in Los Angeles Wednesday 17 October 1956 on KTTV (Channel 11), followed by Philadelphia Saturday 20 October 1956 on WFIL (Channel 6), by Altoona PA Thursday 22 November 1956 on WFBG (Channel 10), by Minneapolis Sunday 23 December 1956 on KMGM (Channel 9), by Omaha Wednesday 9 January 1957 on WOW (Channel 6), by Chicago Monday 14 January 1957 on WBBM (Channel 2) and by Seattle 23 April 1957 on KING (Channel 5); its New York City television premiere took place 23 November 1957 on WCBS (Channel 2), and in San Francisco it first aired 10 February 1958 on KGO (Channel 7).
The trivia items below may give away important plot points.
The character of Connie was the most drastic change from play to film. In the film she is a shy pretty young nurse who is sadly shot down while swimming. In the play, Connie is actually a Nazi spy who sells out the other nurses, kills one of them, and is killed trying to surrender.