A "Spock vs. Spock" ad should, when considered logically, be a complete nerdfest packed with inside jokes only Star Trek superfans would appreciate. Instead, Audi's new spot, "The Challenge," is a charmingly bizarre vignette in which two of geek culture's greatest heroes refrain from taking themselves too seriously. "New Spock" Zachary Quinto plays his part pretty straight, leaving plenty of room for the original Vulcan, Leonard Nimoy, to be straight-up amazing. With his chaotic mop of hair, gravelly grumble of a voice and inspiring rendition of "The Ballad of Bilbo Baggins" (from the actor's second album, released in 1968), Nimoy steals every scene of this nearly three-minute oddity. The spot was created by agency PMK*BNC and Paulilu, the comedy team behind Dollar Shave Club's viral launch video.