Mantzoukas's AI-turned-celestial-being Derek showed up one more time for the finale, but by this point, he's been rebooted so many times that he's become an all-knowing being of energy that looks like a giant, mildly creepy floating head. His quirky resume includes a few recent voice roles, including in Dickinson and Doolittle, and he has voice roles on the animated comedy Big Mouth and the upcoming Invincible.