"Conan O'Brien Can't Stop", is an intimate portrait of an artist trained in improvisation, captured at the most improvisational time of his career. It offers a window into the private writers room and rehearsal halls as O'Brien's "half-assed show" (his words) is almost instantly assembled and mounted to an adoring fan base. At times angry, mostly hilarious, O'Brien works out his feelings about the very-public separation with comedy and rockabilly music, engaging in bits with on-stage guests such as Stephen Colbert, Jon Stewart and Jim Carrey, duetting with Jack White and sweating out manic Elvis Presley covers with his band and back-up singers. We see a comic who does not stop -- performing, singing, pushing his staff and himself.