Behind every good Starfleet Captain on Star Trek is a reliable second-in-command.
The first officer, or Number One, as they’re sometimes called, advises the Captain, steps in to take the lead when needed, and has earned the respect and loyalty of Captain and crew alike. Sometimes these skilled individuals aren’t even officially a part of Starfleet when they start out, but never is there any doubt that they’re the best ones for the role when things need to get done. Over the years we’ve been introduced to some very different first officers in Star Trek, and while some are more interesting than others, they all share many of these qualities.
But who’s the best of the first officers we’ve met in the TV universe so far? Here’s how I’d rank these Number Ones.