Ishi gives Hiro the catalyst.
The formula has a third part known only as "the catalyst".
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 inot 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 phonecall 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 cataylst. However, the transfer is too much for Ishi's body and she dies immediately.
Later, Claire and Hiro are both back on the Deveaux rooftop when Arthur teleports there. He telekinetically pushes Claire away, then using his ability, takes both Hiro's power and the catalyst from him.
The formula takes its effect on Scott, giving him the ability to exert a large amount of physical force.
- It is unknown whether Dr. Zimmerman used the catalyst when he gave Tracy, Niki, and Barbara abilities.
Talk (Archive 1)