‘NCIS’ Quiz: How Well Do You Know “Gibbs”?

By Ann Walters | Updated on September 26, 2025

From Rule #1 to that famous head slap—this quiz tests your Gibbs knowledge across rules, cases, backstory, and team moments. You’ve got 5 minutes. Passing score is 14/18. Answers + explanations show at the end. Good luck, probie. 😉

What is Gibbs’s middle name?
- A) James
- B) Jethro
- C) Joseph
- D) Jackson
Which branch did Gibbs serve in before NCIS?
- A) Army
- B) Air Force
- C) Marine Corps
- D) Coast Guard
Gibbs drinks his coffee with cream and sugar. (True/False)
- False
Which small-town is central to Gibbs’s origin story?
- A) Mayville, OH
- B) Stillwater, PA
- C) Quantico, VA
- D) Bethlehem, PA
What’s Gibbs’s favorite drink?
- Coffee
Which of these is actually Gibbs’s Rule #1?
- A) Never apologize.
- B) Never let suspects stay together.
- C) Always wear gloves at a crime scene.
- D) Trust your gut.
Gibbs has how many ex-wives commonly referenced—and which ones are named on the show?
- A) Three
- B) Four
- C) Diane Sterling
- D) Kate Todd
Name of the boat Gibbs worked on in his basement (one of the famous builds).
- A) Abigail
- B) Kelly
- C) Rule 91
- D) The Kelly Rule
Gibbs speaks sign language. (True/False)
- True
Which agent did Gibbs famously “head slap” the most in early seasons?
- A) McGee
- B) DiNozzo
- C) Bishop
- D) Vance
Who was Gibbs’s mentor in the agency?
- A) Mike Franks
- B) Tom Morrow
- C) Leon Vance
- D) Tobias Fornell
Which of these are actual Gibbs Rules?
- A) Never say you’re sorry on the job.
- B) Always wear gloves at a crime scene.
- C) Never go anywhere without a knife.
- D) Never involve lawyers.
What is the name of Gibbs’s late daughter?
- A) Abby
- B) Kelly
- C) Shannon
- D) Sarah
Gibbs and FBI Agent Tobias Fornell have only a hostile relationship. (True/False)
- False
Where does Gibbs keep a stash of cash and passports?
- A) In his desk at NCIS
- B) Buried behind a brick in his fireplace/basement area
- C) In his gun safe
- D) In his pickup glove box
Which hobby is most associated with Gibbs at home?
- A) Restoring cars
- B) Building boats
- C) Painting
- D) Wood carving only
What’s Gibbs’s usual reaction to long explanations or tech jargon?
- A) Loves it
- B) Gives “the look” and asks for the short version
- C) Writes it down
- D) Sends an email
Which item does Gibbs often carry that ties to his Marine past?
- A) Challenge coin
- B) Dog tags
- D) A compass
- C) Medals

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