Stardate 42437.5: The Enterprise receives a distress call from Dr. Ira Graves, who turns out to be terminally ill. Graves was Soong's mentor and is sort of Data's "grandfather." Data spends some time alone with the dying man, who shows him a device capable of transferring his personality into a computer. Briefly later Data announces Graves's death. When he is back on the Enterprise, Data begins to exhibit unusual behavior, arrogant and egocentric. Deanna finds out that there are two personalities in Data; the second one has to be Graves as Picard surmises. Graves refuses to leave Data's body and even becomes violent against Geordi and Picard who try to stop him - until he finally resigns and transfers himself into the ship's computer.

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