Yusuf

Yusuf works behind a desk at MI6, the kind of tech-support figure who keeps the machinery of espionage running while everyone else gets the glory. He is precise, a little put-upon, and treats his corner of the operation with more seriousness than his superiors ever quite acknowledge.

He works because he grounds a show built on glamorous excess in the unglamorous reality of actual intelligence work — someone has to do the tedious part. Robert Gilbert plays him with dry, understated competence, so that his exasperation with the chaos around him becomes a quiet, welcome joke.