Dangerous Nan Mcgrew is a fictional character who was first played by Helen Kane in the Boop persona. The film was released in 1930. Dangerous Nan Mcgrew is an entertainer in a travelling medicine show run by her boss. Muldoon one of the members of the medicine show is a fugitive who is on the run from a murder charge. Betty Boop plays Dangerous Nan Mcgrew in The Bum Bandit which was released in 1931, a year after Helen Kane starred in her star role. Betty Boop was a caricature of Helen Kane and appeared in the Talkartoon which was parodying the film as portrayed by Harriet Lee. Betty didn't speak in her usual baby talk and spoke in a deeper sounding rough vocal to match the original persona of Nan McGrew. In the Bum Bandit Betty appears as bandit Nan Mcgrew, where she holds up a train and forces Bimbo to come home and take care of their 17 kids.
- The first Dangerous Nan Mcgrew film, was made in 1919 and starred Fay Tincher as Nan Mcgrew, which would have been classed as a silent film, it's also classed as a lost film.
- Dangerous Nan McGrew is the sister of Dan Mcgrew who appears in two films is based on the poem The Shooting of Dan McGrew 1915 which was remade in 1924, which originated from a poem.
- Kane was the last person to play the character Dangerous Nan McGrew, the character is the Annie Oakley type, who sports two guns.
- Dangerous Nan McGrew was referenced in the $250,000 Infringement Lawsuit.
- Betty Boop sings a alternative version of the title song entitled "I'm Dangerous Nan McGrew", and also performs "The Hold Up Rag" at the beginning of the animation.