Development At the beginning of
Star Trek: The Next Generation third season,
Michael Piller became the
head writer for the series. Among the changes he implemented was the opening of the story submission process to non-professional and unrepresented writers. Despite
Paramount Television's resistance to the change,
The Next Generation became the first show produced in Hollywood to allow such writers to submit their scripts. The studio received more than 5,000 scripts in a year. Among the scripts submitted by freelance or aspiring writers was one by Trent Christopher Ganino. Ganino's
speculative script, submitted to the office of pre-production associate Eric A. Stillwell in April 1989, was titled "Yesterday's Enterprise". The story involved the
Enterprise-D's response to a crisis in the Golecian sector and an encounter with the
Enterprise-C, which had been destroyed 18 years earlier. The crew of the
Enterprise-C is in awe of the newer ship's technology, and Picard is confronted with whether to reveal to his guests their ultimate fate. An
Enterprise-C ensign accidentally discovers the fate of his vessel and panics, requiring Worf and Riker to capture him after he attempts to escape. When Golecian warships attack, Picard defends the
Enterprise-C using the same maneuver that caused the vessel's destruction in the past. The ensign goes back to his ship, which returns to the past and its certain destruction. Due to the backlog of scripts, the processing of draft submissions could take anywhere from weeks to a year. Ganino's script was "logged" on May 2 and first read later that month by Richard Manning, a co-producer on the writing staff. Manning commented that the draft was "not horrible, not particularly
original, but good in spots, lousy in others". This review was enough to keep the script in circulation. Executive story editor Melinda Snodgrass read Ganino's speculative script for "Yesterday's Enterprise" in June and attached a Post-It note declaring the story an "interesting idea". A "coverage" of the script, which outlined the plot and provided creative feedback, was written in August. This analysis called the script a "good effort by an unrepresented writer", and considered the script's weak characterization and plot issues correctable. The main issue was whether the producers wanted to do a show with time travel. .|alt=A woman with short blonde hair looks to one side. Meanwhile, Ganino and Stillwell struck up a friendship and began to develop ideas for other episodes.
Gene Roddenberry had distributed a memo that said the return of
Leonard Nimoy as
Spock would be unlikely due to financial considerations, and suggested that a reasonable alternative would be to feature
Mark Lenard, who played Spock's father
Sarek. During the same period, Stillwell met Denise Crosby – who played Tasha Yar in the series' first season – at a 1989 fan convention in San Jose. Over dinner, Crosby admitted she missed being part of the series and suggested that Stillwell write a script to bring back her character, who was killed off in the episode "
Skin of Evil". Ganino and Stillwell began to work on script ideas that would involve both Yar and Sarek. Ganino and Stillwell were particular fans of two episodes from the original
Star Trek series, "
Mirror, Mirror" and "
The City on the Edge of Forever", and wanted to combine elements from them for a
Next Generation episode. They came up with a story involving a team of
Vulcans investigating the
Guardian of Forever. In the past, the founder of modern Vulcan logic,
Surak, is killed, causing massive changes to the timeline. The Romulans and Vulcans joined forces to attack the Federation, Worf is no longer a crewmember on the
Enterprise, and Tasha Yar remains alive. Sarek and the Vulcans by the Guardian are the only people not affected by the timeline change and, in the end, Sarek returns to the past to take Surak's place, restoring the timeline. After Ganino and Stilwell pitched him the new script, Piller suggested to producer
Rick Berman that the story, not the script, be purchased. In a meeting, Piller told Ganino that he wanted to make changes to the story, which included the addition of Tasha Yar. Fearing that what they considered a better story would be lost if the changes were made to "Yesterday's Enterprise", Stillwell talked to Piller and pitched their Guardian of Forever story. While intrigued by elements of the story, Piller felt the use of the Guardian was a "gimmick" and wanted
The Next Generation to stand on its own. Instead, Piller suggested that they merge the two stories, with Stillwell and Ganino sharing writing credit. Piller suggested that the
Enterprise crew would immediately undergo a transformation due to the presence of the older
Enterprise, and that Guinan would be integral to the realization that something was wrong. Ganino and Stillwell were given two weeks to complete their new story.
Writing Ganino and Stillwell completed their new combined story in about a week. The writers spent hours each day at Stillwell's apartment working over every detail; they felt pressured to write a story Piller would find acceptable, as they wanted to have the opportunity to write the teleplay. The story treatment was turned in on October 10. Piller immediately decided to purchase the story and distributed the treatment to the writing staff while he discussed changes. Piller felt that Data's romantic feelings for Tasha Yar were over the top, and that an alien probe which served as a central part of the story was a cheat in terms of resolving Picard's dilemma. The writer wanted Ganino and Stillwell to enhance Guinan's role and to find another
character arc for Tasha Yar. A revised treatment was submitted on October 29, incorporating Piller's changes. The writers were not involved in development of the teleplay. They were each paid the
Writers Guild minimum of $2400. The production of the episode, originally scheduled for January 1990, was moved to December 1989 to accommodate the filming availability of Crosby and
Whoopi Goldberg, who played Guinan. The task of writing and polishing the new treatment in half the time fell upon writer
Ronald D. Moore, who submitted his first draft on November 9. Moore's script removed the alien probe and made the alternate universe militaristic, with the Federation and the Klingons at war. Some characters, such as Troi, appeared only briefly at the beginning of the episode to allow more screen time for the guest characters. The
beat sheet for the episode, which detailed characters and scenes, was distributed on November 27. Due to time constraints, a team of writers was assigned to write the teleplay. In addition to the story credit to Ganino and Stillwell, Moore,
Ira Steven Behr, Hans Beimler and Richard Manning would work on the teleplay, and Piller would provide the finishing touches. Because the Writers Guild would not allow more than three staff writers to appear in the credits (four after a special waiver was granted), Piller agreed to not feature his name in the credits. A partial first draft was submitted on November 30 so that preproduction for the episode could commence. The altered timeline provided a chance to show the
Enterprise crew in a much more dramatic and human light than would be allowable in a normal episode. Behr explained that since the original timeline was to be restored, the writers had the freedom to include more action. "Even though it was an alternate universe, [Moore] and I got all excited because we realized we were going to kill everyone on screen", he said.
Michael Okuda and
Rick Sternbach submitted technical memos regarding the type of anomaly that might drag the
Enterprise-C through time, and suggested interstellar, super-dense
strings as a possibility. The first draft teleplay was completed by December 4, and a preproduction meeting was held the same day. Given the scale of the story, various departments argued over costs and what items could be cut to reduce the budget. The final draft was finished and submitted on December 8.
Design The studio decided to increase the episode's budget, which at that time was estimated by
Daily Variety as $1.2 million per episode. This gave the production departments more leeway. One reason for the increase was that "Yesterday's Enterprise" would air during February
sweeps, an important time for the studio to attract solid ratings. As
The Next Generation was
syndicated directly by the studio, the episode's performance would affect advertising revenue for the future. ; the ship was designed to be the logical link between the
Excelsior- and
Galaxy-class starship design.|alt=An oblong, blue-grey starship with an oval hull and two flanking, glowing engines The script called for the creation of the
Enterprise-C. In the first season, illustrator
Andrew Probert – who had designed the
Enterprise-D – was interested in a display of the design lineage of the ship from
James T. Kirk's
Enterprise to
The Next Generations much larger ship, which was realized as a wall relief in the conference lounge behind the command bridge. Like most others, Probert assumed that the
Enterprise-B was an
Excelsior-class vessel and reasoned that the
C would share design elements with its
Excelsior-class predecessor and its
Galaxy-class successor, Picard's ship. During this lineage project, Probert also produced a small color sketch of his version of
Enterprise-C, but he left at the end of the season and his absence meant that no one knew what the drawing was intended to be. When Rick Sternbach took over Probert's duties, he believed the sketch was a rejected concept for the
Enterprise-D, but the ship's design stayed with him. When he learned about the ship requirement for "Yesterday's Enterprise", he followed a thought process similar to Probert and built off the old sketch. Probert's version had a highly curved engineering hull reminiscent of a sailing ship, but Sternbach was worried that a design with so many compound curves would prove difficult to fabricate in the available time, so he made the hull entirely circular. A set of orthographic views was created and sent to
Greg Jein, who fabricated the shooting model, which cost more than $10,000 to produce. The model was modified to appear as various
Ambassador-class starships in later
Next Generation episodes, with its saucer and nacelles spaced apart to create a larger ship. The production crew took several steps to differentiate the alternate universe from the original one. In addition to the absence of a counselor, a "military log" was substituted for a captain's log and a "combat date" was used rather than stardate. The expanded budget allowed the bridge to be entirely redressed, something that would normally be infeasible. Steps replaced ramps on the bridge, and the captain's chair was elevated and made more throne-like. Longer, spartan tables were also substituted for the usual decor in the Ten-Forward lounge. While enlisted crew aboard the darker
Enterprise wore variations of the Season 1–2 uniforms, the senior officers wore slightly modified versions of the uniforms introduced in Season 3. The
Enterprise-C officers wore costumes from earlier
Star Trek feature films due to the expense and time-consuming nature of creating more than a half-dozen or so new uniforms for the episode. Costume designer
Robert Blackman's solution to change their appearance was to remove the turtleneck collars underneath the red tunics, as well as the belts, although the rear belt loop remained.
Filming and casting Filming began on Monday, December 11, 1989, and lasted for seven days. The episode was directed by
David Carson, who had only filmed one other
Next Generation episode before "Yesterday's Enterprise". Carson felt that his relative lack of experience helped because he had no preconceptions about how episodes should be directed. Since much of the episode took place in the darker alternate universe, Carson wanted to emphasize the toll that decades of war had taken on the crew and the bridge. "Picard really looked tired and worn and like a battle-weary commander, and that's what we wanted the bridge to look like—a battle weary bridge. I had lots of thoughts about making it as strong as possible using a lot of low lights, a lot of dark blues, making it very much more moody", he said. To heighten the impact of the physical set changes, Carson took a different approach to how he constructed shots. "It was my intention to make it as much like a
submarine as possible and to use low-angle lighting; basically, to do everything the opposite way that the
Enterprise was normally shot." The cameras were equipped with longer lenses than usual in order to reduce the depth of the scenes and provide a grittier feel. The use of low angles forced the lighting to be modified to prevent the scene from, in Carson's words, looking "like a hotel lobby". Two new roles – Garrett and Castillo – needed to be filled for the production. The actors selected were both
Star Trek fans.
Christopher McDonald was picked for Castillo. "What impressed me about [McDonald]", Carson remembers, "was that he wasn't just your romantic leading man; he was actually a very impressive actor."
Tricia O'Neil was cast for similar reasons; the actress was not the normal
Star Trek commander type. Carson was also pleased to work with Crosby and Goldberg. The main cast enjoyed the opportunity to play their characters differently. The unusual degree of friction between characters provoked some concern with the producers. Berman, for example, was afraid that the episode was pushing the alternate timeline too far. Ganino and Stillwell visited the set frequently during filming. Members of the main cast approached Stillwell with questions about the nature of the altered universe, trying to determine if they were still playing the same characters. Goldberg asked Ganino about changing a piece of dialogue on set, but since Ganino was not the author of the teleplay, he deferred to Stillwell, who in turn notified the production office. When Berman found out that Ganino and Stillwell were on set and talking to the actors, he banned them from setting foot on the sets again. Many planned elements were never filmed, due to production time constraints. Moore had hoped for an extended battle scene in which Data would be electrocuted, and
Wesley Crusher blown up in an explosion. Production of the episode ended on December 19. ==Release and reception==