FBI Season 9 Episode 4, titled Reticence, aired on CBS on October 26. According to Rotten Tomatoes, the official synopsis for the latest episode reads as follows:"The team investigates a missing infant and a string of murders as it all connects to a rocket propulsion company on the verge of going public. They struggle to find the truth when their investigation points to the daunting conclusion that the suspect is one of their own."The latest episode of FBI Season 9 began after a man who ran away from a crime scene stole a car, unaware that it had a six-month-old baby sleeping in the backseat. The team learned about the murder and the missing infant when his mother, Jennifer, called for help, which uncovered a shocking truth about Maggie's new partner, Isaiah Green.According to TV Line, OA was back from his undercover assignment but was struggling to adapt. While OA refused to talk about his time on Anna Vorpe's strike team, his girlfriend, Zara, was helping him.Here is the complete recap.Isaiah became a murder suspect in FBI Season 9 Episode 4 View this post on Instagram Instagram PostThings took a turn in FBI Season 9 Episode 4 when Jennifer remembered that the man who stole her car and baby was covered in blood. The team hit a jackpot when they found a blood sample from a nearby fence and discovered that he was connected to the homicide case of a woman named Amanda Murray. The DNA sample was a match in their database. It belonged to Maggie's new partner, Isaiah Green.The team was naturally shocked when they discovered Amanda was Isaiah's ex-girlfriend, which suggested he likely killed her. ADIc Green was shocked to learn his nephew was connected to the latest case, but he told his team to treat Isaiah like any other suspect. He revealed that Amanda and Isaiah were about to get married when she broke things off. The team tracked the stolen car to Austin Brown, Amanda's current boyfriend, but the baby and Maggie's partner were nowhere to be found.The team learns a shocking truth about Isaiah in FBI Season 9 Episode 4Jubal and the team learned a shocking truth about Isaiah in FBI Season 9 Episode 4 when they searched his house and found antidepressants. It turns out Isaiah had bipolar disorder and he had not been taking his medications for the last month. Isaiah's psychiatrist concluded that he developed the disorder after his breakup with Amanda and he decided to skip the pills because they made his hands shake. Since Isaiah could not afford to be in the field with a weapon, he stopped the medication, which likely led to an episode.Maggie and the team learned that Isaiah was also investigating Amanda's murder to prove his innocence in FBI Season 9 Episode 4. The team finally caught him and he was admitted to a hospital but he had no recollection of the baby. While all evidence pointed against Isaiah, Maggie trusted her partner. Isaiah remembered that Amanda was having trouble at work and was scared by somebody, which became a breakthrough in solving her murder.The truth came to light in FBI Season 9 Episode 4A still from Season 9 (Image via Instagram/@fbi_cia)Maggie learned that Amanda worked as a VP at Sovereign Rocketry and was about to report a major flaw in the company's rocket before its launch to her bosses. Since the company would naturally lose millions because of the flaw, another member of her team orchestrated a conspiracy to commit her murder. Maggie and the team eventually tracked down the real culprits and Isaiah's name was cleared. However, he still did not remember the whereabouts of the baby.In the final moments of FBI Season 9 Episode 4, Isaiah tracked the baby through the smell of a particular flower. It turns out he left the baby at a daycare, and he was eventually reunited with his mother. As the episode concluded, Isaiah accepted that he needed help and approached his uncle.You can stream the latest episode on Paramount+.For the latest scoops on your favorite TV shows and movies, follow SoapCentral.