|First aired:||October 12, 2009|
|Next spoiler:||Tabula Rasa|
Self-discovery rocks their world as our Heroes encounter new abilities, try to recall past lives and stumble upon an unexpected kiss--Madeline Zima, Dawn Olivieri, Deanne Bray, Tessa Thompson, Ernie Hudson, Ray Park and academy award-winner Louise Fletcher guest star.
Samuel (Robert Knepper) prepares for new additions to his family, while Lydia (guest star Dawn Olivieri) warns him of the consequences. Claire (Hayden Panettiere) discovers that her roommate Gretchen (guest star Madeline Zima) may have a hidden agenda. Meanwhile, Peter (Milo Ventimiglia) finds an unexpected way to connect with Emma (guest star Deanne Bray), who would prefer to stay distant. Elsewhere, a different side of Sylar (Zachary Quinto) emerges as he desperately tries to remember the person he used to be. Masi Oka and Cristine Rose also star. Rachel Melvin and Jack Wallace also guest star.
- The title refers to the unseen terrors lying in wait for the heroes.
- The title refers to someone who has the ability to make someone blind
- The title refers to Hiro, driven blind by his overuse of ability
- The title refers to some finding out about Sylar/Nathan, and their blindness to it
- Gretchen is a lot like Charlie and Monica, as seen from her easy advancements in life school, guitar hero, etc.) If she is not already fully aware of her abilities and playing with Claire, having killed Annie herself, Gretchen will become one of Claire's greatest concerns, as her only real friend on campus.
- Gretchen will have an ability which she will use to make Claire kiss her.
- Gretchen probably has the ability of pheromone manipulation or empathic manipulation
- Gretchen doesn't have an ability.
- Claire is not a lesbian.
- Claire is bisexual.
- Annie is alive.
- Hiro disappeared in Acceptance and will re-appear to witness Annie's death.