Because she was so often relegated to the background, Denise Crosby chose to leave Star Trek: The Next Generation near the end of the show's first season. In "Skin of Evil," an oil-slick creature named Armus kills Yar, bringing her character to a rather anticlimactic ending. But it's curious to wonder what would have happened if Yar had still been around when TNG really hits its stride during the show's third season. Yar's survival would have drastically changed TNG, possibly resulting in a smaller role for Lt. Worf (Michael Dorn) and numerous other major and minor changes.
Tasha Yar & Data Could've Had A Full-Blown Star Trek: TNG Romance
Data's Possible Feelings For Yar Would've Been An Important Step On His Journey Toward Humanity
In Star Trek: The Next Generation season 1, episode 3, "The Naked Now," Tasha Yar has a romantic and intimate encounter with Lt. Commander Data (Brent Spiner). While this happens when the Enterprise crew members are under the influence of an intoxicating substance, it's still a meaningful moment for both characters. She later tells Data that the encounter "never happened," but Yar clearly felt something for the android. As seen in TNG season 2's "The Measure of a Man," the experience meant a lot to Data, and he always remembered Tasha fondly.
Whether or not Tasha Yar and Data ever became a true couple, it would have been nice to see how their relationship progressed. In TNG season 4, episode 25, "In Theory," Data tries dating a fellow Enterprise crew member named Jenna D'Sora (Michele Scarabelli). While this episode feels like a bit of a setback for Data as a character, it likely would have worked better with Tasha Yar. Data and Tasha already had a connection that an episode like "In Theory" could have explored, making the story more impactful. Plus, Tasha (and Data's potential feelings for her) could have helped Data on his quest to be more human.
Tasha Yar Surviving Would Have Changed Star Trek: TNG's "Yesterday's Enterprise"
Tasha Yar Briefly Returned In "Yesterday's Enterprise," Only To Be Killed Off Again
Early drafts of the idea for the episode included Spock's father, Sarek (Mark Lenard), and the Guardian of Forever first seen in Star Trek: The Original Series' "The City on the Edge of Forever." It's possible one or both of these ideas may have been incorporated into the episode if Yar had not been the central focus.
As the Enterprise-D crew help repair the Enterprise-C, Tasha Yar develops a connection with the ship's helmsman Lt. Richard Castillo (Christopher McDonald). Having learned of her "senseless death" in Star Trek's Prime Timeline, Tasha decides to return to the past with Castillo and the Enterprise-C, saying that at least then, her death would "count for something." Yar was brought back partly because Denise Crosby had reportedly expressed a desire to return to the show. If Yar had been around the whole time, "Yesterday's Enterprise" would have been a completely different episode.
Tasha Yar Could Have Returned To Her Home World
Tasha & Her Sister Ishara Could Have Reunited
A couple of early Star Trek: The Next Generation episodes reveal hints about Tasha Yar's dark backstory. She and her sister, Ishara (Beth Toussaint), grew up in a failed Federation colony on Turkana IV, where they had a rough life after their parents were killed. The Enterprise-D visited Turkana IV in TNG season 4, episode 6, "Legacy," in which Ishara paid a visit to the ship. If Tasha had survived, she could have visited her homeworld and reunited with her sister, who viewed Tasha as a coward for abandoning their planet.
Throughout TNG's run, most of the show's main characters had episodes dedicated to them. Presumably, Tasha Yar would have gotten to be the star of some episodes if she had stuck around. These episodes could have offered more insight into her character, revealing more about her backstory and exploring her relationship with her sister. Ishara might have become a more prominent recurring character. Yar's episodes could have also put her fighting skills on full display, illustrating why she was chosen to be security chief on the flagship of the Federation.
Would Worf Have Become One Of Star Trek's Greatest Characters If Tasha Yar Stayed In TNG?
If Worf Never Became Security Chief, He Might've Played A Smaller Role
Ensign Ro Laren (Michelle Forbes) may never have been introduced at all, as the two had similar backgrounds and Yar could have had some of the stories meant for Ro.
However, it's also possible that Worf would have become just as popular and that his popularity would have prompted TNG to explore more Klingon stories. In this case, Tasha's survival might have led to characters like Counselor Deanna Troi (Marina Sirtis) or Dr. Beverly Crusher (Gates McFadden) being featured even less. Tasha Yar had the potential to be one of Star Trek: The Next Generation's most interesting characters, but we'll unfortunately never know what her Star Trek story could have been if she'd stuck around.