"THE CHARLIE GIRL IS THE NEW CHARLIE'S ANGEL" was the headline that dominated entertainment news in late-May of 1979. Shelley had been cast as Charlie's 5th Angel in the show's 4th season and the entire world was excited to see THE Charlie Girl fight crime as one of Charles Townsend's cherubs. "Believe it or not, the headline 'Charlie Girl becomes the new Charlie's Angel' carried a lot of weight," said Ed Lakso, a writer/producer in the series. Executive producer Aaron Spelling told TV Guide, "We hired her 40 percent from the screen test and 60 percent from the personality test." He added, "We decided she was a nice person with sparkle and intelligence." According to People magazine, Shelley Hack as Tiffany Welles was going to bring a classy "Tiffany touch" to the series. "She was sort of like the debutante," co-Angel Jaclyn Smith said about Revlon's Supermodel. "Shelley seemed like a doll and we were going to have a lot of fun working together," said her other co-Angel Cheryl Ladd. "Jackie, Cheryl and I hit it off immediately," Shelley said. "Put your ear to the wall, all you'll hear is laughter," she added. On September 12, 1979, Charlie's Angels 4th season debut episode, "Love Boat Angels," topped the Nielsen ratings.