Robert De Niro and Eddie Murphy star in Showtime as a couple of cops- a quiet, efficient Dirty Harry-like cop and a cop who is deep down an actor, respecively, who are brought together by an accident and forced to take part in a cop-buddy reality TV show for a hungry for ratings producer (Rene Russo). For the first two acts, it delivers a good time in parodying old cop/buddy movie cliches and shows how De Niro and Murphy have some intelligent chemistry in a comedy, but the third act dips by leaving the parody and becoming what it's making fun of. In all, a conventional and surely enjoyable escape on a weekend day. B+