No. 7: Sheila Carter

Played By: Kimberlin Brown (1990-93; 1995)

Feminine Wiles: Nurse Sheila seduced Scott while he was separated from Lauren and became pregnant. But after Sheila miscarried in 1991, she still pretended to be pregnant, bought a black market baby and switched it with Lauren's son, Dylan. Sheila married Scott, but when Lauren's "son" died, the truth slowly unraveled. A desperate Sheila kidnapped Lauren, who was rescued from a fire by Paul, and Sheila was presumed dead in the blaze. Unbeknownst to all, shady Sheila was actually alive and well and had fled to Los Angeles, and Lauren and her true son, now named Scotty, were reunited. In 1995, Sheila resurfaced in Genoa City in an unsuccessful attempt to keep Lauren from moving to L.A. Once back in California, Sheila continued to wreak havoc on Y&R's sister soap, BOLD AND BEAUTIFUL.

No. 8: Eve Howard

Played By: Margaret Mason (1980-84; 1993)

Feminine Wiles: Smitten with her former boss Victor, secretary Eve showed up in 1980 with a boy she claimed was Victor's from a past affair. Victor denied her claim, but gave her hush money not to create a scandal. Victor rehired Eve, who plotted to kill him upon learning he'd included her son, Cole, in his will. Eve poisoned Victor, who faked his death in order to trap her. Victor gaslighted the daffy dame, and after being betrayed by her henchman/lover Max, she was caught and institutionalized. The following year, she escaped and crashed Victor and Nikki's wedding, where she tried to kill the bride but failed. In 1993, she returned to prevent Cole from marrying Victor's daughter, Victoria, whom she believed was Cole's half-sister. Eve died before she could break the news, but after her death, Victor discovered that he was not Cole's father after all.