(Warning: This “Black Bird” post features spoilers for the show’s finale.)Audiences and critics have been hooked on the Apple TV+ series “Black Bird,” which wraps its limited run this Friday on the streamer. Across its first five episodes, the six-episode series has been driven by suspense and an increasingly heightened intensity as Jimmy Keene (Taron Egerton), a convicted drug supplier, attempts to lessen his jail term by befriending and eliciting a confession from Larry Hall (Paul Walter Hauser), a suspected serial killer just days away from getting out on a technicality. In the finale, Hauser gave a chilling performance as Larry, as he finally confessed to Jimmy he’d committed nearly two dozen murders.