After becoming engrossed in Assane's case and the similarities between him and Arsène Lupin, Youssef decides to go off on his own and find Assane in the final episode. However, when he comes face-to-face with Assane, he doesn't address him by his actual name. Instead, he calls him Lupin. Perhaps Youssef's fascination with the Lupin books and Assane's case will convince him team up with Assane as a double agent.