In 1979, Charle's Angels executive producers Aaron Spelling and Leonard Goldberg - along with input from stars Jaclyn Smith and Cheryl Ladd, selected Shelley Hack to become Charlie's Angel no. 5. She played Tiffany Welles, the daughter of Charlie's childhood friend who became a police chief in Boston. She was introduced in the episode "Love Boat Angels," which was a crossover episode between Charlie's Angels and another Spelling-produced hit The Love Boat. The episode was partially filmed on location in the U.S. Virgin Islands and had the entire cast of The Love Boat in character as guests. The two-hour episode topped the Nielsen ratings and despite the negative reviews (which the series always got anyway) was predicted to be a big hit in the upcoming television season with the addition of Shelley.