'Bette Davis Eyes'

Jac is determined to remain unaffected by her mother, Paula's, situation, in the 500th episode of the medical drama.

But when Paula deteriorates, Jac is forced to admit to Michael and Joseph that she's the mother who deserted her. Jac decides to offer Paula a kidney.

When Chrissie goes into early labour, her baby boy is delivered by emergency C-section. Chrissie finally admits to Mark that Sacha is the father.

Meanwhile, Faye is thrown by a letter reminding her to choose an inscription for Archie's gravestone.