Jeri Ryan as Seven of Nine, Tertiary Adjunct of Unimatrix Zero One on “Star Trek Voyager”
Seven of Nine (born Annika Hansen) is a fictional character who appears in seasons four through seven of the American science fiction television series Star Trek: Voyager. Portrayed by Jeri Ryan, she is a former Borg drone who joins the crew of the Federation starship Voyager. Her full Borg designation is Seven of Nine, Tertiary Adjunct of Unimatrix Zero One. The character Seven of Nine arrived just as the character Kes was leaving, and was intended to introduce a foil to Captain Kathryn Janeway in a similar manner as Spock does to Captain Kirk in Star Trek: The Original Series.
Seven of Nine was played by Jeri Ryan for four Voyager seasons. The character was a part of the last four seasons which concluded in 2001 with its seventh season, and Seven was featured in many episodes despite coming later to the series. Seven was introduced in the second part of the episode “Scorpion”, the first episode of the fourth season. The character continued to appear throughout the series until the final episode, “Endgame”. Stories related to her relationship with Captain Janeway and with The Doctor appeared throughout the series.
Several episodes, such as “The Raven”, explored her background and earlier life as Annika Hansen before she was assimilated by the Borg. Her romantic life is a mystery due to her Borg emotional restrictions; she does proposition Harry Kim but he turns her down. Later on, with the Doctor’s assistance, she tries dating other crew unsuccessfully, while later exploring intimate relationships with a hologram of Chakotay. Finally, in the series finale Endgame she is involved in a short-lived romantic relationship with Chakotay which includes at least three dates and a first kiss before she “alters the relationship’s parameters”. However, in one alternate timeline they get married, and in another she is killed along with the rest of the Voyager crew (“Timeless”).
Her real name was known to her crewmates, but after joining the Voyager crew she chose to continue to be called Seven of Nine, though she allowed “Seven” to be used informally.
Seven of Nine, again played by Jeri Ryan, is due to appear in the upcoming series Star Trek: Picard.