The Jetsons - Season 2 Episode 16 -

A Mercurian Mirrormorph that was supposed to be delivered to the local scientific institute winds up going to the Jetsons' residence instead and causes all sorts of trouble as it messes up Judy's date and gets George fired as it has the ability to impersonate anyone who touches it. But if the same person holds it for more than 10 seconds, it could end up multiplying out of control and overrunning Orbit City!