After two seasons of an intense build-up, NCIS: Sydney Season 3's latest episode, titled 'True Blue', finally revealed the Special Agent's backstory to the fans and her team members.The military procedural's third season returned with a shocking revelation that Blue had resigned from the team. What's even shocking about that decision was that she didn't even meet with her team one last time and just disappeared from their lives after leaving a video message.This strange behavior did not sit right with Doc, and he finally broke into Blue's house in NCIS: Sydney Season 3 Episode 2, which revealed the Special Agent's backstory. The NCIS team realised that Blue was an ex-felon who grew up in a cult with her twin brother. She even changed her identity and betrayed the team to gain entry into the AFP.More on Blue's backstory in our story.NCIS: Sydney Season 3 Episode 2- How did Blue change her life around? View this post on Instagram Instagram PostDoc, JD, and Mackey finally discovered dark secrets about Blue's life in NCIS: Sydney Season 3 Episode 2.After Doc breaks into Blue's house, the team discovers human bones in her ceiling and her connection with her twin brother Eli. Blue's traumatic backstory revealed that she grew up within a cult, where she was made to believe that he father had left her. However, once Blue got suspicious of the cult's activities and its female leader, Aspira, she stole a bone density scanner to trace the bones' identity to her father. Additionally, she also stole books from libraries and other houses (by breaking into them).After Mackey orders the team to investigate the bones in NCIS: Sydney Season 3 Episode 2, they discovered that they belonged to Blue's father, Robert.After Blue realized that her cult was a fake, she filled the gaps in her education and changed her identity once she left juvie. Since the Navy had no hold over a person's local criminal records, her past was sealed, and she managed to join the Australian Federal Police.How was Blue saved in NCIS: Sydney Season 3 Episode 2?A still from Episode 2 (Image via Instagram/@ncisverse)While the NCIS team was fishing for clues, Blue was duped and lured back to the cult by Aspira. She had fabricated a story about how Blue and Eli's energy as Gemini twins would ascend all the members to heaven. She even cooked a poisonous tea for her mass su*cide mission and wanted everyone to drink from it and be the lone survivor standing on the $50 million worth of land.However, the NCIS: Sydney team managed to arrive in time, and Doc saved Blue's brother, who had taken the poison tea.While Blue and Eli were saved in NCIS: Sydney Season 3 Episode 2, Mackey and JD discovered Blue's personnel file, which revealed that she was an ex-felon before becoming a Special Agent. While the lead members have not shared Blue's secret with anybody for now, it might change Blue's future in the team forever.But for now, Mackey and JD understand that Blue has gone through a lot and needs time to process this. In an interview with TV Insider, showrunner Morgan O’Neill hinted that Blue would have to re-gain her team's trust:''When you fail to tell the truth to people that you love and respect, that impacts trust, right? It’s impossible not to feel, on some levels, betrayed by that. So, how does Blue even start to repair that breach in trust? And I think, as we’ll see, that’s a huge mountain to climb...''NCIS: Sydney Season 3 Episode 2 revealed that Blue might have been an ex-felon who kept this dark secret from her team, but she had no choice. Blue and her brother were born into this lifestyle and were forced to fend for themselves. It might be criminal according to the law, but Doc and the NCIS: Sydney team understood her motivations and truly became her found family in every sense.NCIS: Sydney Season 3 will air weekly episodes every Tuesday on CBS.For the latest scoops on your favorite TV shows and movies, follow SoapCentral.Also Read: NCIS Season 23 Episode 2 recap