Paul Williams is a fictional character on the American CBS soap opera The Young and the Restless. Paul was introduced to the show on May 23, 1978, and has been portrayed by Doug Davidson until 2020. Initially, Paul was a "bad boy", who had a romance with Nikki Reed, giving her an STD. The relationship ended, but the two have remained friends since. After a year on the series, Bell gave the character a proper backstory, surname and family. This included his notoriously unstable sister Patty Williams. After a failed marriage to April Stevens —who gave birth to his daughter Heather Stevens —focus turned towards Paul's career as a private investigator, as well as his relationship and eventual marriage to and later divorce from Lauren Fenmore. Paul's string of unsuccessful romances with women—including his ill-fated bride Cindy Lake, and Cassandra Rawlins, the wife of one of his clients—continued. Over the years, Paul continued to become heavily involved in various storylines as a private investigator.

Nikki Newman is a fictional character from the American CBS daytime soap opera, The Young and the Restless. Created and introduced by William J. Bell in 1978, the role was portrayed by Erica Hope, before Melody Thomas Scott took over in 1979. Introduced as a stripper, the character became well known for her relationship with businessman Victor Newman, a union that developed into a supercouple pairing that has spanned over four decades. She shares two children with Victor, Victoria and Nicholas Newman. In 2013, she reveals that she had previously given up a child for adoption, who is later discovered to be Dylan McAvoy. The character has also had several other notorious relationships, including Paul Williams, Jack Abbott, and Brad Carlton. Scott is considered an icon in the soap opera genre.