Tonight on CBS NCIS: Sydney airs with an all-new Tuesday, May 5, 2026, season 3 episode 18 called, “Rough Diamond” and we have your weekly NCIS: Sydney recap below.
In tonight’s NCIS season 3 episode 18, “Flight Club as per the CBS synopsis, “The death of a former Marine wanted for murder leads the team to a sinister plot involving a disgraced journalist, one of Australia’s richest men and lab-grown diamonds.”
So make sure to bookmark this spot and come back between 10:00 PM – 11:00 PM ET for our NCIS Sydney recap. While you wait for the recap make sure to check out all our NCIS recaps, spoilers, news & more, right here!
Tonight’s NCIS: Sydney Recap begins now – Refresh Page often to get the most current updates!
In tonight’s NCIS: Sydney episode, two thirteen year olds stole a car. They didn’t know how to drive so they ended up crashing the car. They also took off the moment the cops showed, but they hadn’t known that they were driving with a body in the trunk. They stole it because it was the only car not locked.
It was an old heap of a thing. It probably doesn’t have locks they’d understand anyway. The teens managed to escape and the cops were more focused on the body. The body was identified as Former Staff Sergeant Brad Slater.
He used to be a Marine. The cops didn’t know about that at first. They had an APB out on him. The dead guy was wanted in the murder of another man, Someone by the name of Murray Holt.
They both worked for Bob Prince. He was also known as Aussie Bob. He was Australian’s richest man for several decades. He was a bit of a character. It turns out that Brad was the head of his security and the other man was his footman. The rich apparently still have footman. It took Mackey by surprise when she first heard it.
They found one other thing on Brad. It was a safe cracker. The only person with a safe were the rich so they went back to Aussie Bob. They asked him about a safe and he showed it to them.
The only thing still in there was a footie card. Bob showed that card to them. It was a high priced. It’s why it was kept safe. Aussie Bob still had the card and what he lost were the diamonds. The diamonds that he stole from mines. Bob was a diamond miner. Brad’s body showed them that he had diamonds hidden in false eye.
It turns out Prince didn’t have a business. The mines had been dormant since they bought a year ago. He usually fake diamonds to sell at a cost. He was making money that way and was still seen as rich. Prince got in trouble that he’s been selling fake diamonds while all long the real ones will be held back.
There was also two murder cases to solve. If Brad killed Murray Holt then who killed Brad. Brad also had another secret. He had diamonds hidden behind the fake eye. He lost it in the filed. Anyways, there were diamonds in the eye. There was a story about arms dealing using fake diamonds as a front.
A journalist tried to wrote about it and she got sued for defamation. She spent six months in jail for contempt. She now writes about pumpkin contests and who won the biggest one. It was the journalist who forced the story out.
She went after Brad because she thought they were on the same side when they weren’t. The journalist was only after a story. A story she wanted to write about Aussie Bob. Aussie Bob had no reason to kill his footman. They’ve been together for years. Now, killing Brad did cross his mind after the footman thing.
He told NCIS that they would’ve cut his body in pieces. Bob kept a special card in his safe that was worth more than the paintings on the wall. He was still there. He claimed there was nothing else and that had been a lie.
They found the diamonds in the fake eye of the victim. To make it worse, the car that he was found in had gotten stolen. The woman who owned had died three months ago. They were trying to last family member to know whose car was used. There were a lot of loopholes to jump through.
It just didn’t change facts that it wasn’t Aussie Bob. He stopped by to get diamonds after they arrested the journalist. He was a dangerous man, but it seems he has enemies if they were willing to force Brad and Murray to die.
And send a dangerous journalist to prison.
THE END!
