Carlotta hosts a celebration for Keri, and R.J. crashes the party. Keri insists to Hank that R.J. has changed, but Hank notices how R.J. glares at Antonio. Antonio confronts R.J. about his interaction with Shawna, but R.J. maintains his cover.
Ben agrees to keep the news of Jack's illness from Blair, but Todd grows alarmed when Dr. Shiller points out the unlikelihood of both children having the same disease if Jack is adopted. In a panic, Todd blurts out that Jack and Starr are full brother and sister, but Dr. Shiller informs Todd that Starr still cannot donate her bone marrow for Jack's cause because she already had the disease herself. Todd realizes that he must find Starr's bone marrow donor - Alex Olanov. Meanwhile, Alex orders a drink in a Santo Domingo bar, and Blair rushes to the hospital after a call from Larry.
Al fears Max will reveal the truth before he marries Jen. Natalie informs Cristian that Al kept his ability to walk a secret from Jen to keep her from backing out of marriage, and Cristian leaves to stop the wedding. Left alone, Natalie looks at all her pictures of Seth for one last time before throwing them in the trash.