Helena Barrett

Thirteen's date gets ill after a night of partying, and House takes on her case; Foreman confronts Thirteen about her self-destructive lifestyle; private investigator Lucas is hot on Wilson's trail.

Gibbs second-guesses himself when Vance assigns a rookie to work with him on the team's investigation into a deadly bank robbery.

In its effort to determine who shot Horatio Caine, the team discovers evidence that leads to some of the most-dangerous people in Miami and to one of its own.

A series of deaths from radiation poisoning may be related to a deadly tome in the library.

Aria finds herself in a difficult position when trying to process Spencer and Emily’s news about Jason (recurring guest star Drew Van Acker), while dealing with what happened at the park and her undeniable feelings for him. How could Jason be the dangerous person that her friends say he is, when he has shown nothing but compassion and vulnerability to her? With Aria waffling on her stance on Jason, Spencer decides drastic times call for drastic measures. But will Spencer’s actions help Aria to see Jason for who Spencer thinks he really is, or will it only push Aria closer to Jason? Meanwhile, Hanna finds herself in a different kind of prickly situation when she tries to play nice with her future stepsister, Kate (recurring guest star Natalie Hall – The Good Wife, All My Children), only to have things go horribly wrong. Plus, “A” turns up the heat on Emily by trying to push her to a breaking point.