Over the years there have been many guest appearances on Star Trek, some better than others, but few quite as irritating as Doctor Stubbs, a self proclaimed 'wunderkind' hellbent on completing a Federation approved science experiment. In an episode where an ever evolving micro organism invades the Enterprises' computer, debilitating it in the process, Stubbs serves as little more than an extra annoyance in everybody's ear, including the audience, as the crew scrambles to find an answer. The episodes conclusion isn't particularly clever or interesting, just another data ex machina moment. The only redeeming qualities about the episode is that the visual effects have taken a notable leap from previous seasons, and it is only guilty of being incredibly mediocre, unlike the offensively bad openings of previous seasons.