At about the same time, Greene learns that the tumor has returned, and that this time it was inoperable. She indirectly finds out about Mark's plight from Susan (who doesn't outright say Mark's cancer is back, but makes it so obvious that Elizabeth gets it), and her half-hearted initial claim to him that she'll come back home is rejected by Mark, with him saying he doesn't want her to return on account of his terminal illness. Elizabeth later has a medical case hit close to home (a selfish woman's sister refuses to agree to a life-saving liver transplant procedure) and after getting a dose-of-reality from speaking to Romano, Corday does move back in with him and Rachel. Greene eventually leaves Chicago to spend his final days with his daughter in Hawaii. On the walk home after a day of surfing, Mark suffers a seizure and in a panic, Rachel calls Elizabeth, who arrives in Hawaii soon after with Ella. The four spend Mark's last few days bonding and overcoming obstacles. Corday tells Rachel after the funeral that it would be all right for her to visit her sister, and later on she does so and Elizabeth bemusedly helps Rachel acquire birth control pills when her stepdaughter shows up with her teenage boyfriend. Elizabeth's tension with her stepdaughter seems to be over at this point; she helps Rachel without question, and Rachel does not judge the fact that Elizabeth is dating again, saying that Mark would have wanted her to find someone and that they both miss him.