The novel upon which this film is loosely based was also published under the titles "The Saint Meets His Match" and "She Was a Lady", the latter being its original publication title. Many changes were made, including changing the local from Europe to San Francisco, replacing Scotland Yard inspector Teal with NYPD Inspector Fernack, and changing the female lead's name from Jill Trelawney to Valerie Travers. Jill/Valerie was also British in the original book.
The second of nine classic RKO movies featuring Simon Templar, The Saint starring George Sanders.