Arthur Petrelli takes the catalyst from Hiro.
|First mentioned:||The Second Coming|
|Owned by:||formerly Ishi Nakamura (deceased), |
formerly Hiro Nakamura (stolen),
formerly Arthur Petrelli (deceased)
The genetic modification formula has a third part known only as "the catalyst" and "the light".
At the same time, Angela tells Claire that she needs to stay in hiding, and that Noah will protect her. The two go to The Canfields' home and Noah trains Claire to fight. Elle and Sylar find them but Noah manages to incapacitate them before they take Claire.
Hiro and Claire go to the roof of the Deveaux building, to witness Kaito handing Claire to Noah. Later, Hiro learns through a conversation between Kaito and Ishi that Ishi is the catalyst. They both know that she will die soon, and Kaito wants her to give the catalyst to Claire.
Meanwhile, Claire goes to see Sandra, who has just adopted Claire's younger self. Claire pretends to be from another apartment and wants to babysit herself. When Noah comes home, he becomes angry at Sandra for letting strangers into the house, as it could violate their assignment. Claire accidentally lets incorrect information slip and Noah discovers that she does not actually live nearby. Claire stops Noah from answering the phone call that she knows will result in herself becoming the catalyst, instead telling Noah that the baby will end up becoming more than an assignment to them, and she will grow up and live with them for sixteen years, possibly more.
After Kaito leaves, Hiro goes to see his mother. Using her ability, she heals his memory and he remembers how much he misses her. Hiro says that he is ready and she gives him the catalyst. However, the transfer is too much for Ishi's body and she dies immediately.
Later, Peter shoots Arthur, but the bullet is stopped by Sylar. When he finds out that Arthur is not actually his father, he lets the bullet continue on its path, killing Arthur and destroying the catalyst.
- It is unknown whether Dr. Zimmerman used a catalyst when he gave Nathan, Tracy, Niki, and Barbara abilities.
- In a question and answer session, writer-producers Joe Pokaski and Aron Coleite confirmed that if the catalyst's host body dies, so does the catalyst. Thus, when Arthur died, so did the catalyst.
Please refer to Theory:Catalyst for fan-created theories and other speculation.
Catalyst • Cello • Claire's wind chime • Compass • Daphne's medal • D.L.'s medal of valor • Have a Nice Day mug • Hope's bag • Mohinder's cocoons • Peter's identity box • Ray • Spinach can • Tracking systems • Tuning fork • Virginia's snow globes
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