Sharon Gless (comparing the characters of Christine Cagney and Lynne Warner): Cagney was more petulant, more immature. Cagney was an angry cop with a mouth on her, who had dreams of becoming the first female police commissioner and was driven almost in an unhealthy way. Lynne is much more controlled, much cooler. She may be a hothead inside the room, but never to her detriment. Cagney had no respect for authority at all, but Lynne does respect her President.