Elizabeth Gracen guest stars as the Vampire Queen, who hopes to supplant the demon-possessed Cole (Julian McMahon) as ruler of the Underworld. To do this, the queen must shift the balance of power by turning Paige (Rose McGowan) against her half sisters, Charmed Ones Piper (Holly Marie Combs) and Phoebe (Alyssa Milano). Meanwhile, Phoebe is beginning to exhibit the signs of morning sickness -- indicating that the plan to impregnate her with Cole's evil seed is right on schedule! ~ Rovi