Una Chin-Riley, commonly and originally only known as Number One, is a fictional character in the science-fiction franchise Star Trek. She is Christopher Pike's second-in-command during his captaincy of the starship Enterprise.
Majel Barrett as Number One in the rejected 1965 pilot for Star Trek: The Original Series, "The Cage"
Rebecca Romijn portrays Number One/Una Chin-Riley in Star Trek: Discovery and Star Trek: Strange New Worlds
Christopher Pike (Star Trek)
Christopher Pike is a fictional character in the Star Trek science fiction franchise. He is the immediate predecessor to James T. Kirk as captain of the starship USSĀ Enterprise.
Anson Mount at the 2018 San Diego Comic-Con panel for Discovery
Bruce Greenwood as Pike in the 2009 film.