While investigating a fatal arson case, Horatio discovers that a member of his team has a shady connection to one of his suspects.
Jack manhandles a prisoner in order to obtain information; Tony interrogates Reza about his association with a known terrorist.
CTU scrambles to retrieve vital information; Kim refuses to abandon Megan; Kate faces her sister's wrath when CTU shows up at the Warner home.
Nina wants President Palmer to protect her from Jack; Mason instructs Tony to interrogate Reza and Bob Warner together; a terrorist presses Kate for information from her father's files.
Jack and Michelle try to decipher Nina's conversation in Arabic with Faheen; the police question Kim about a grisly discovery in the trunk of Gary's car.