Kate Leinbaugh

To answer those questions, Joe and Drew and a team of Wall Street Journal reporters worked across four continents. They spoke with more than 30 former and current officials in nine countries. They obtained hundreds of court documents and personal records. The Kremlin never responded to their questions.

To answer those questions, Joe and Drew and a team of Wall Street Journal reporters worked across four continents. They spoke with more than 30 former and current officials in nine countries. They obtained hundreds of court documents and personal records. The Kremlin never responded to their questions.

After months of reporting, our team untangled the truth about Russia's most famous family of spies and unspooled the story of a global hunt, a hunt that hinged on lucky breaks, old-school sleuthing, and leaps of faith. How did they get caught? That's a long story. Welcome to The Journal, our show about money, business, and power. I'm Kate Linebaugh. It's Friday, March 28th.

After months of reporting, our team untangled the truth about Russia's most famous family of spies and unspooled the story of a global hunt, a hunt that hinged on lucky breaks, old-school sleuthing, and leaps of faith. How did they get caught? That's a long story. Welcome to The Journal, our show about money, business, and power. I'm Kate Linebaugh. It's Friday, March 28th.

After months of reporting, our team untangled the truth about Russia's most famous family of spies and unspooled the story of a global hunt, a hunt that hinged on lucky breaks, old-school sleuthing, and leaps of faith. How did they get caught? That's a long story. Welcome to The Journal, our show about money, business, and power. I'm Kate Linebaugh. It's Friday, March 28th.

Coming up on the show, inside the hunt for Putin's sleeper agents. June 14, 2013. Buenos Aires, Argentina. When the patient arrives at the hospital, she's quiet, petite, and clearly in late-stage pregnancy. Medical staff end up running towards her.

Coming up on the show, inside the hunt for Putin's sleeper agents. June 14, 2013. Buenos Aires, Argentina. When the patient arrives at the hospital, she's quiet, petite, and clearly in late-stage pregnancy. Medical staff end up running towards her.

Coming up on the show, inside the hunt for Putin's sleeper agents. June 14, 2013. Buenos Aires, Argentina. When the patient arrives at the hospital, she's quiet, petite, and clearly in late-stage pregnancy. Medical staff end up running towards her.

The woman checks in and gives the name Maria Rosa Mayer Munoz. That's Dr. Mario Perez, the obstetrician who saw Maria. He's delivered thousands of babies.

The woman checks in and gives the name Maria Rosa Mayer Munoz. That's Dr. Mario Perez, the obstetrician who saw Maria. He's delivered thousands of babies.

The woman checks in and gives the name Maria Rosa Mayer Munoz. That's Dr. Mario Perez, the obstetrician who saw Maria. He's delivered thousands of babies.

Dr. Perez jotted down some notes. Patient Maria was barely interacting with staff. She didn't seem to ask questions or have many requests. She delivered the baby quietly, with no anesthesia.

Dr. Perez jotted down some notes. Patient Maria was barely interacting with staff. She didn't seem to ask questions or have many requests. She delivered the baby quietly, with no anesthesia.

Dr. Perez jotted down some notes. Patient Maria was barely interacting with staff. She didn't seem to ask questions or have many requests. She delivered the baby quietly, with no anesthesia.

The couple names their baby girl Sophie, a natural-born Argentine. Maria and her husband Ludwig speak to each other in hushed voices, cooing with the baby in fluent Spanish. And again, there's something weird.

The couple names their baby girl Sophie, a natural-born Argentine. Maria and her husband Ludwig speak to each other in hushed voices, cooing with the baby in fluent Spanish. And again, there's something weird.

The couple names their baby girl Sophie, a natural-born Argentine. Maria and her husband Ludwig speak to each other in hushed voices, cooing with the baby in fluent Spanish. And again, there's something weird.

A year later, Maria is pregnant again, this time with a son. And during this second delivery, the doctor again notes her composure.

A year later, Maria is pregnant again, this time with a son. And during this second delivery, the doctor again notes her composure.

A year later, Maria is pregnant again, this time with a son. And during this second delivery, the doctor again notes her composure.