This episode masterfully blends high-stakes corporate espionage with a deeply personal, life-or-death crisis for one of LIBRA's most unique members. In "Branchial Blues," the narrative centers on Zed O'Brien, whose crucial, specialized breathing headphones, the very apparatus that allows him to survive and breathe out of water, are heartlessly stolen by a greedy, unscrupulous arms-dealing corporation. The episode shines in its emotional weight, shifting from the show's usual chaotic humor to a tense, adrenaline-fueled rescue mission. Watching the rest of the LIBRA crew, especially Leonardo and Zapp, completely drop their casual bickering to hunt down the corporate thieves and save their friend’s life is beautifully written, backed by a stunning, melancholic yet explosive jazzy soundtrack.