Samuel prepares for new additions to his family, while Lydia warns him of the consequences. Claire discovers that her roommate Gretchen may have a hidden agenda. Meanwhile, Peter finds an unexpected way to connect with Emma, who would prefer to stay distant. Elsewhere, a different side of Sylar emerges as he desperately tries to remember the person he used to be.

"Strange Attractors" is the sixth episode of the fourth season of the NBC science fiction drama series Heroes and sixty-fifth episode overall. The episode aired on October 26, 2009.

"Shadowboxing" is the eighth episode of the fourth season of the NBC science fiction drama series Heroes and sixty-seventh episode overall. The episode aired on November 9, 2009.