Sheila Carter
The role was portrayed by Kimberlin Brown for a total of 16 years. Her first run was on "The Young and the Restless" from May 1990 to May 20, 1992, when the character crossed over to "The Bold and the Beautiful" from May 21, 1992, to October 2, 1998, again from May 24 to November 5, 2002, and again finally from September 26 to October 10, 2003. Despite being a regular cast member on "The Bold and the Beautiful", Brown returned to "The Young and the Restless" for several guest appearances beginning on October 27, 1992. Brown departed on November 5, 1992, and reappeared for one episode on December 23, 1992. She continued making appearance from January 7 to 14, 1993, February 19, 1993, to March 2, 1993, October 11, 1993, October 19 to 27, 1993, January 12, 1994, and February 28, 1995, until March 2, 1995.
Sheila Carter
Sheila (Brown) returns to Los Angeles in June 2017. When she attempts to leave Katie Logan (Heather Tom)'s home without being noticed, Quinn Forrester (Rena Sofer) hears her leaving, immediately asking who she is. Introducing herself as a friend of the Logan family, Sheila reveals herself to Katie, making for her assistance in making amends with those she had wronged in Los Angeles. Startled by her arrival, Katie immediately alerts Eric of Sheila's re-appearance; arriving at Katie's and believing that Sheila is the one who shot at Quinn, Eric escorts Sheila to the police station, and has her arrested for violating an order of protection he had previously filed years prior. When it is revealed that Deacon Sharpe (Sean Kanan) is the one who was targeting Quinn, Eric extends an olive branch to Sheila, welcoming her back to the Forrester estate, much to the disapproval of Quinn and Ridge (Thorsten Kaye). Sheila immediately begins to dig into the life of Eric, rooting herself into his marriage with Quinn. After scheming with Forrester security officer, Charlie Webber, Sheila exposes Quinn's affair with Ridge. As Sheila comforts and supports an emotionally hurt Eric, she is confronted by Steffy Forrester (Jacqueline MacInnes Wood), who — believing Sheila to be armed — shoots her in Eric's hotel room, but she survives, only sustaining a flesh wound. Sheila continues to insinuate herself into Eric's life, faking a concussion after a catfight with Quinn to manipulate Eric into letting her stay in the Forrester mansion. Sheila blackmails her ex-husband, James Warwick, into lying about the severity of her condition, but slips up when Quinn catches her walking around normally. Sheila gets a waitressing job in town to eavesdrop on the residents of Los Angeles, and later offers Eric's estate manager Mateo money to seduce Quinn, but her plan is foiled when Mateo tells Quinn the truth. Sheila is thrilled when Eric invites her to the Forrester mansion with the intention of replacing Quinn's portrait with Sheila's, but this turns out to be a ruse. As Eric and Quinn again demand that Sheila leave, Sheila smiles to herself outside the closed mansion door.