Posing as a trio of young rock 'n roll musicians, The Impossibles were actually crime fighters, with superpowers, dedicated to battling evil supervillains of all shapes and sizes.[2] When performing for their adoring fans (usually star-struck, screaming teenyboppers), the lads would play their mod, futuristic-looking guitars atop an equally futuristic bandstand (emblazoned with their "Impossibles" logo on the side, a la Ringo Starr's drumkit) that could convert into a car (the "Impossi-Mobile"), or a jet (the "Impossi-Jet"), a speedboat, or even a submarine. Their standard catch cry when called into action was "Rally ho!"
Their humorous dialogue was typically peppered with puns. As with many Hanna-Barbera characters, the Impossibles were topical and inspired by the times, in this case resembling the rock 'n roll groups of the mid-Sixties.
