Released: 22 June 1977 
(6.9/10) out of 15,458 votes Color: Color
Budget: $1,200,000
Awards: 2 Awards,
USA Title: Bernardo y Bianca
Genres: Adventure, Animation, Crime, Drama, Family, Fantasy, Mystery
Directors: John Lounsbery, Wolfgang Reitherman
Writers: Margery Sharp, Larry Clemmons
Cast: Bob Newhart, Eva Gabor, Geraldine Page, Joe Flynn, Jeanette Nolan, Pat Buttram, Jim Jordan, John McIntire, Michelle Stacy, Bernard Fox, Larry Clemmons, James MacDonald, George Lindsey, Bill McMillian, Dub Taylor
Two unlikely heroes. One outrageous rescue adventure!
When a bottle containing a plea for help from a little girl named Penny makes its way to the Rescue Aid Society, a mouse organization in the basement of the United Nations building dedicated to the rescue and well-being of anyone in need, it is up to the brave mouse Miss Bianca and her chosen partner, the shy janitor Bernard, to rescue the girl. Searching for clues at her home at Morningside Orphanage in New York City, the two mice discover that the girl has been kidnapped by the evil pawn shop owner Madame Medusa and her companion Mr. Snoops. On the back of Orville the albatross, Miss Bianca and Bernard travel to the terrifyingly gloomy Devil's Bayou island where they learn the shocking truth: the innocent young girl is being forced down into a dangerous, dark underground pirate's cave where she must find the Devil's Eye, the world's largest diamond and Madame Medusa's greatest obsession...
Fun Fact: Early in story development, Bernard and Bianca were supposed to be rescuing a poet much older than Penny from a gloomy prison. This idea was scrapped since the directors decided that it was just not working.