Ep 1. Lange, H.

In the season 3 premiere of NCIS: Los Angeles, titled "Lange, H.," the team is tasked with investigating the death of Callen's former partner and friend, Dom. The episode opens with the team attending Dom's funeral and we see Callen struggling with the loss.

The team begins to investigate Dom's death and it becomes clear that he was murdered in his home. As they dig deeper, they discover that Dom had been investigating a case involving a former Navy SEAL, Hunter Lange, who had gone missing in Afghanistan years earlier. The team believes that Dom's death may be connected to Lange's disappearance.

Throughout the episode, we see the team piece together clues and conduct interviews to try to solve the case. They discover that Lange was involved in an operation that went wrong and resulted in the deaths of several civilians. Lange was believed to have been killed in the operation, but it is revealed that he had actually fled the country and assumed a new identity.

As they get closer to solving the case, the team discovers that Lange is actually alive and living in the United States. They track him down, but he refuses to speak with them. They eventually learn that Lange's family is being held hostage by a group of Afghan militants who are demanding information from Lange about the operation that went wrong.

The team works to rescue Lange's family and bring them to safety. In the end, they are able to do so, and Lange agrees to turn himself in. He is taken into custody and the team is able to bring closure to Dom's case.

Overall, "Lange, H." is an intense, action-packed episode that highlights the emotional toll that cases can take on the agents. We see Callen struggling with the loss of his friend and former partner, and we see how the team works together to solve the case and bring justice to those who have been wronged.