That Darn Cat!

That Darn Cat! is a 1965 American thriller comedy film starring Hayley Mills and Dean Jones in a story about bank robbers, a kidnapping and a mischievous cat. DC, a wily Siamese tomcat, lives with young suburbanite sisters Ingrid "Inky" and Patricia "Patti" Randall, who follows bank robber Iggy into the apartment where he's holding bank employee Margaret Miller hostage. Patti discovers a watch on her cat, which leads to an entertaining game of cat-and-mouse as she convinces the FBI that it's hard evidence in the case, ultimately leading to the kidnappers' arrest and Miss Miller's liberation.