When photographer Billie Mason (Louise Currie) and journalist Jeff Carter (Wallace Ford) are leaving for Dr. Brewster's (Bela Lugosi) house, Billie jokingly calls Jeff "Mr. Brisbane". In the banter, she was referring to Arthur Brisbane (1864-1936), who was known as the greatest newspaper journalist of his time.
By the Poverty Row standards of Monogram Pictures, this was considered successful enough that an ersatz sequel, Return of the Ape Man (1944), starring Bela Lugosi, John Carradine and George Zucco) was released the following year. Other than Lugosi, the second film actually had nothing to do with this one.
As Billie sits in Jeff's car at the 24-minute mark, she says to him, "All right, let's go . . . if you've got any gas." The reference is to World War II gasoline rationing that was a constant concern for motorists in 1943.
Shot in 19 days.