Former Policewomen
The characters in the show were all written to have originally been in the police force. The characters of Jill, Sabrina and Kelly were all said to have been part of the Los Angeles PD, while the character Kris was said to have been with the San Francisco PD.
The only character not to have been in the police force was Julie, who was said to be an ex-model. Interestingly, the LAPD inducted its first woman policewoman in 1910. Her name was Alice Stebbins Wells. Her induction was the first nationwide, making her the first policewoman in the United States of America.