Dana L. Wilson

Howard and Sheldon bond on their way to the desert to launch a model rocket. Leonard's mother befriends Penny, which annoys Leonard.

A school field trip to the hospital takes a dramatic turn when the kids witness two injured cops enter the emergency room. Meanwhile, Stephanie sets her eyes on one of the chaperones, Callie operates on the leg of the police captain and Amelia must face her feelings for Owen.

Danny and Baez meet with resistance while investigating a bombing and Frank deals with political fallout after a man punches an aggressive officer.

The odds are stacked against Colter as he is tasked by a convicted murderer's teenage daughter to track down a missing witness who could prove her dad's innocence.

Dexter is preoccupied, with Isaak still on the loose, but an internal struggle within the Koshka Brotherhood could work to Dexter's advantage. Elsewhere, while Miami Metro is on the hunt for a 'phantom arsonist', Dexter goes to great lengths to protect his relationship with Hannah, asking a favour of Debra that causes her to question her loyalty to Dexter.

The team links a bizarre crime scene at Arlington National Cemetery to a string of attacks on homeless veterans.