NCIS Season 5 Episode 10 is titled Corporal Punishment. It first aired in the United States on November 27, 2007.
The episode keeps the show’s usual style. It mixes military crime, suspense, tension, and action. The NCIS team investigates crimes connected to Navy and Marine personnel. This case is dark and disturbing as it involves a traumatized Marine. It includes escape, kidnapping, secret experiments, and a violent final showdown.
In NCIS Season 5 Episode 10, a decorated Marine returns from Iraq. He is then locked up for PTSD treatment. After that, he disappears. The NCIS team begins a search to find him. As they investigate, they uncover a much darker truth. They face questions about loyalty, mental health, and the limits of science.
The episode tests the Marine’s physical strength. It also tests the mental strength and morals of everyone involved. With strong tension, intense action, and deep character moments, the NCIS cast brings this powerful and troubling story to life.
NCIS Season 5 Episode 10 cast and characters

These are the main team members in NCIS Season 5 Episode 10.
Mark Harmon plays Special Agent Leroy Jethro Gibbs. Gibbs is the leader of the NCIS Major Case Response Team.
Michael Weatherly plays Special Agent Tony DiNozzo. Tony is a senior field agent. He works on the investigations.
Cote de Pablo plays Special Agent Ziva David. Ziva is an NCIS agent. She is also a former Mossad liaison. She helps work the case.
Sean Murray plays Special Agent Timothy McGee. McGee is a junior NCIS agent. He helps the team with the investigation.
Pauley Perrette plays Abby Sciuto. Abby is the forensic science expert. She studies the evidence in the lab.
Lauren Holly plays Jenny Shepard. She is the Director of NCIS. She oversees all operations.
David McCallum plays Dr. Donald “Ducky” Mallard. Ducky is the chief medical examiner. He handles autopsies and medical evidence.
In NCIS Season 5 Episode 10, Gibbs, Tony, Ziva, and McGee hunt for the escaped Marine. They try to track him down and stop him safely. Abby and Ducky analyze the forensic and medical evidence. Their work helps explain what really happened.
Director Shepard oversees the case. She handles the command-level decisions. Together, the team drives the full investigation and helps bring the crisis to an end.
These are the guest actors in NCIS Season 5 Episode 10. Their characters help move the main story forward.
Paul Telfer plays Marine Corporal Damon Werth. He is the main person in the case. He is a Marine who returned from Iraq. He is being treated for PTSD. Later, it was found that he was also given steroids. He escapes from the hospital. His escape starts the NCIS investigation.
José Zúñiga plays Navy Captain Dr. Adrian De La Casa. He is the psychiatrist treating Damon Werth. During the escape, Werth takes him hostage. This makes the doctor a central part of the crisis.
Amy Carlson plays Karen Sutherland. She works for a biotech company. Her role connects to secret medical experiments. This links to the idea of a “super-soldier” program behind Werth’s condition.
Patrick Fabian plays Ray Vincent. He is a PR worker. He represents political and public image pressure. Because Werth is a decorated Marine, image and honor matter. His role shows the outside pressure on the case.
Marcuis Harris plays Chris Jenkins. He is a hospital orderly. He gives information about Werth’s time in the hospital. He helps the team learn how Werth got the steroids and why he became unstable.
John Siciliano plays Marine PFC Nathan Stone. He is a fellow Marine and veteran. He knew Werth personally. He helps explain Werth’s past and mental state. His role helps show Werth’s trauma and motives.
What’s the storyline of NCIS Season 5 Episode 10?

NCIS Season 5 Episode 10 begins with a strange and scary case. A Marine being treated for PTSD suddenly vanishes. He was staying in a secure military hospital ward. The Marine’s name is Damon Werth.
The NCIS team is told to find him and arrest him safely. As they investigate, they learn the truth is much worse. Damon is not just running away. He has taken a Navy doctor hostage. The doctor’s name is Dr. De La Casa. Damon also stole a car and fled.
Now the case becomes high-risk and very urgent. The team learns that Damon is mentally very unstable. They also discover something even darker. The evidence suggests Damon was part of a secret experiment. It may involve a supersoldier program. It likely used steroids and masking drugs.
The tension reaches its peak at a rehab gym facility. The NCIS team finally finds Damon there. They first try to talk him down. But the situation turns violent. Damon attacks Gibbs, Tony, Ziva, and McGee. Several agents are injured. The team is left shocked and shaken.
The danger is not only physical. The forensic team finds something even more serious. Damon’s violent behavior and paranoia may not be from PTSD alone. It may be caused by a strong mix of steroids.
This may also explain his strange, superhuman strength. This discovery raises big moral questions. Was a human chemically changed into a weapon? Who allowed this to happen? What does this say about heroism and the cost of war on the mind and body?
The NCIS team now races to do two things in NCIS Season 5 Episode 10. They must stop Damon. They must also discover who changed him and why.