remember that time Tom Paris went really fast, died, resurrected himself by became a Time Lord, evolved into a salamander, kidnapped the captain who also turned into a salamander (and possibly would have also become a Time Lord), mated with the captain (apparently REALLY quickly, they weren't missing for that long??), had three salamander babies, abandoned the salamander babies and then he and the captain were magically transformed back to normal with not even a scar? and then it was never, ever mentioned again.