Billy Doyle was Rimmer's alter-ego in Back to Reality. He had bleached, sticky-uppy hair and wore a heavy coat that smelled of yak urine. In fact, he was disgusting. The part of it all that really depressed him was that his brother, Sebastian Doyle was so much more successful than him. Unlike Rimmer, Billy Doyle could not blame his own short-comings on his parents, since Sebastian had achieved so much success. So he decided to kill himself.