Written by J. Michael Straczynski, directed by David J. Eagle, "Learning Curve" is the fifth episode of Babylon 5’s fifth season, carrying the production episode number 506. Originally airing on February 18, 1998, this installment delves into the evolving dynamics of the Babylon 5 station and the burgeoning interstellar alliances, while also introducing a new criminal element in the station’s lower levels. The episode juxtaposes the rigorous training of the Interstellar Alliance’s (IA) Rangers with internal political friction and the persistent challenges of maintaining order.
Ranger Training and Diplomatic Arrivals
The episode opens on Minbar, establishing the ongoing efforts to expand and refine the Ranger corps. Commander Turval, a seasoned mentor, is seen instructing new recruits in the meditative practices essential for their demanding role. The effectiveness of these sessions varies, highlighting the diverse aptitudes and temperaments within the nascent Ranger ranks. This scene is interrupted by the arrival of Durhan, another respected member of the Minbari Warrior Caste. Durhan has been summoned to Babylon 5 to provide Delenn, who now holds the prestigious title of Ranger One, with a comprehensive update on the Ranger training program. He requests Turval’s accompaniment, underscoring the collaborative nature of their efforts. Accompanying them are two promising trainees, Tannier and Rastenn, representing the next generation of interstellar peacekeepers.
Upon their arrival at Babylon 5, Delenn extends a warm welcome to the Minbari delegation. Her personal history with Turval, who was once her teacher, adds a layer of familial warmth to the professional exchange. Durhan’s esteemed reputation within the Warrior Caste further solidifies the significance of their visit. Delenn, embracing her role as Ranger One and a key diplomat, offers the quartet a comprehensive tour of the station, aiming to familiarize them with its intricate workings and diverse population. This gesture serves not only as hospitality but also as a strategic move to integrate the Ranger command structure more closely with the station’s operational reality.
New Threats Emerge in Downbelow
Concurrently, a starkly different narrative unfolds in the station’s Downbelow sector. A new figure, Trace, is aggressively attempting to establish himself as the dominant crime boss. His methods are brutal and immediate, as evidenced by his public execution of an individual indebted to him. This act is a calculated display of power, designed to instill fear and assert his authority over the existing criminal elements. Trace’s ambition appears to be fueled by a desire for rapid ascent, and his initial actions signal a potentially volatile period for the station’s underbelly. The introduction of Trace underscores the perennial challenge of controlling illicit activities within the complex, multi-species environment of Babylon 5.
Interpersonal Tensions and Political Undercurrents
The episode also highlights developing interpersonal dynamics and lingering political tensions among the station’s command staff. A lunch invitation extended by Commander Garibaldi to Captain Lochley and Security Chief Allan is intended to foster camaraderie. The conversation, initially focused on practical matters such as the station’s ongoing shortage of Starfury fighter craft, quickly devolves into a heated exchange between Garibaldi and Lochley. The core of their dispute centers on Lochley’s allegiances and actions during the recent Earth civil war. Garibaldi, representing a faction loyal to the new IA, harbors reservations about Lochley’s past affiliations. Allan, caught in the middle, attempts ineffectually to steer the conversation towards less contentious topics. The argument culminates with Lochley abruptly leaving the lunch. In a subsequent encounter within a lift, she encounters Captain Sheridan. While Sheridan offers to mediate the dispute, Lochley asserts her independence, stating her intention to handle the situation herself. This exchange reveals the lingering mistrust and the complex political landscape that continues to shape relationships on Babylon 5 in the post-civil war era.

Investigation into Downbelow Murders
Meanwhile, Security Chief Allan launches an investigation into the recent spate of murders in Downbelow. It quickly becomes apparent that Trace is responsible for all three incidents Allan is investigating. Trace, emboldened by his initial successes, decides that Allan should be his next target. His subordinates express caution, warning that while internal disputes among "lurkers" might be overlooked, targeting station security personnel, particularly those in higher positions, would undoubtedly provoke a severe response from the station’s command. Trace, however, remains undeterred, believing that such an aggressive move will grant him greater leverage and control over the station’s security apparatus. This belief demonstrates a critical misjudgment of the station’s operational hierarchy and the swiftness with which its leadership would react to such a direct challenge.
Delenn’s Strategic Insights and Personal Reflections
Back in the command center, Delenn, Turval, and Durhan engage in a detailed discussion regarding Ranger training methodologies. Their conversation touches upon the unique challenges of adapting individuals from diverse species to the Ranger ethos. A particular point of discussion is the difficulty in training a pak’ma’ra, a species known for its primal instincts, to embody the discipline and restraint required of a Ranger. Delenn, drawing on her unique perspective and experience, offers insightful suggestions on how to effectively integrate the pak’ma’ra‘s natural abilities into their training, demonstrating her innovative leadership as Ranger One.
The discussion also shifts to a more personal level as Turval shares his reflections on former students. He speaks with sorrow about Cole, whom he considered his finest student, lamenting that Cole joined the Rangers for the wrong reasons, which likely contributed to his demise. Turval also expresses concern about Lennier, noting that the young Minbari is training with an intensity that suggests he is trying to prove something, hinting at underlying pressures or motivations that may be affecting his judgment. These personal insights provide a deeper understanding of the human and Minbari elements within the Ranger corps and the personal stakes involved in their development.
Garibaldi’s Shifting Roles and Security Concerns
In a separate development, Garibaldi is observed briefing two rogue telepaths, formerly associated with Byron, on their new roles as intelligence operatives for Babylon 5. This assignment highlights Garibaldi’s evolving responsibilities and the station’s adaptation to new forms of intelligence gathering in the post-war era. Following their departure, Garibaldi attempts to access Lochley’s personnel file, an action that Allan staunchly refuses. This interaction underscores the ongoing friction between Garibaldi and Lochley, and Garibaldi’s persistent efforts to uncover information about her past. Allan is subsequently summoned to meet with an informant, setting the stage for a dangerous encounter.
The Downbelow Ambush and the Ranger Intervention
The informant, it turns out, is working for Trace, luring Allan into a meticulously planned ambush. The informant expresses distress upon realizing Trace’s true intention to kill Allan, as she believed the plan was merely to abduct and rough him up. Trace, exhibiting his ruthless nature, orders the informant’s death, demonstrating his reliance on extreme violence as his primary tactic. Fortunately, Tannier and Rastenn, the Ranger trainees, overhear her screams and rush to her aid. Tannier, embodying the proactive spirit of the Rangers, immediately moves to intervene, while Rastenn exhibits a more cautious approach, deeming the situation outside their immediate purview and beyond their current understanding. Tannier manages to save the informant but sustains significant injuries in the process.

Delenn’s Diplomatic Maneuver and Lochley’s Concession
Recognizing the gravity of the situation and the potential for escalation, Delenn intervenes diplomatically. She specifically requests that the Ranger corps handle the apprehension of Trace, citing their independent status, the IA constitution, and Captain Sheridan’s prior agreement. Lochley, though clearly displeased by this directive, which effectively bypasses station security, acquiesces to Delenn’s request. The incident elevates Tannier’s personal stakes; despite his injuries, he is now tasked with confronting Trace directly to achieve justice. This situation serves as a crucial test of his resolve and the core values of the Ranger creed.
The Capture of Trace
Under Lochley’s orders, Allan clears all security personnel from the sector where Trace is located. Trace misinterprets this action as a sign that his plan is succeeding, unaware that this is a calculated move to isolate him for the Rangers. Durhan, Turval, and Rastenn efficiently neutralize Trace’s henchmen, creating an opening for Tannier. Durhan, in a tactical maneuver, promises Trace that if he is defeated by Tannier, the remaining Rangers will allow him to go free, a gambit designed to isolate Trace further and focus the confrontation. Trace, revealed to be more of a strategist who relies on others for combat, proves to be a poor fighter, even when Tannier is wounded. Despite his injuries, Tannier is able to subdue Trace relatively easily, exposing his lack of true combat prowess. Following the capture, Allan arrives to formally arrest Trace, bringing a temporary end to his reign of terror in Downbelow.
Lingering Questions and Past Connections
As the Rangers depart, Delenn offers them her well wishes and specifically asks Turval to keep a close watch on Lennier, reiterating her concern for his well-being and development. The episode then returns to the complex relationships on the station. Lochley makes a pointed comment to Delenn, suggesting she knows Sheridan better than she has previously let on. This remark prompts Delenn to confront Sheridan, who admits to a past connection with Lochley, the specifics of which are revealed off-camera. This revelation adds a new layer to the existing dynamics and hints at a shared history that could influence future events.
The tension between Lochley and Garibaldi escalates as Lochley refuses to provide a direct answer about her allegiances during the civil war. She makes it clear, however, that she was not in agreement with Sheridan’s actions during that period. This ambiguity fuels Garibaldi’s frustration, as he struggles to reconcile her past with her current role on Babylon 5. The narrative subtly points out that Lochley does not bring up the fact that Sheridan’s capture, a significant victory for Clark’s regime, was orchestrated by Garibaldi (though under Bester’s influence, a detail not publicly known). This omission suggests a complex web of unspoken history and potential leverage.
Reflections on Mentorship and the Evolving Ranger Corps
The episode touches upon the theme of mentorship, with Turval being identified as another of Delenn’s influential teachers, joining the ranks of figures like Draal and Dukhat who have guided her development. The integration of Bryon’s rogue telepaths into Garibaldi’s intelligence operations is also highlighted. Their silence during Garibaldi’s briefing prompts a sarcastic remark from him, which is perceived by the reviewer as a nod to budget constraints, requiring the use of non-speaking extras.

The expansion of the Ranger corps to include members from various IA species, beyond humans and Minbari, is presented as a significant evolution. The challenges associated with integrating a pak’ma’ra into this elite force underscore the difficulties and potential successes of this new inclusive policy. The episode also emphasizes the resilience and capability of a wounded Ranger, as Tannier’s victory over Trace demonstrates the profound dedication and training inherent in the role.
Unfolding Mysteries and Personal Repercussions
The episode concludes by teasing the audience with the revelation of Sheridan and Lochley’s past connection, promising further exposition in the following episode. This narrative device creates anticipation and ensures viewer engagement. The final scene between Delenn and Sheridan is emotionally charged. Following Sheridan’s disclosure about his history with Lochley, Delenn sleeps with her back to him, signifying a subtle but palpable shift in their relationship, perhaps indicating a need for space or a moment of reflection.
Casting and Trivial Matters
The episode features notable guest stars and continues the development of established characters. Turhan Bey, previously seen as the Centauri Emperor in "The Coming of Shadows," portrays Turval. Nathan Anderson, Brendan Ford, and Brian McDermott play the Minbari trainees Rastenn, Tannier, and Durhan, respectively. The character of Tannier is slated to reappear in the film "Legend of the Rangers." Dawn Comer appears as an unnamed security guard, providing Allan with someone to interact with during his investigation. Trevor Goddard plays Trace, the ambitious criminal, and Mongo Brownlee portrays Trace’s second-in-command, whose memorable name is highlighted.
In terms of trivia, "Learning Curve" marks Turhan Bey’s final acting role before his retirement. He passed away in 2012 at the age of 90. Delenn’s official appointment as Ranger One, following Commander Sinclair’s temporal displacement to become Valen, was established in "Grey 17 is Missing." Lennier’s decision to train as a Ranger was depicted in "The Very Long Night of Londo Mollari," and Cole’s sacrifice to save Ivanova occurred in "Endgame." Durhan was previously mentioned as Neroon’s pike instructor in "Grey 17 is Missing" and also appeared in the novel "To Dream in the City of Sorrows." The fate of N’Grath, a character established in season one as a major figure in Downbelow’s criminal underworld, remains unspecified, adding another layer of mystery to the station’s ongoing challenges.
Thematic Analysis and Narrative Weaknesses
The episode’s thematic exploration of mentorship, the evolving nature of interstellar diplomacy, and the persistent challenges of maintaining order is underscored by a critical analysis of its narrative elements. The reviewer notes that the Downbelow plotline, involving Trace and his criminal activities, is considered a weak point. The casting of Trevor Goddard as Trace is deemed insufficiently menacing, and the writing is criticized for relying on tired crime-drama clichés that lack realism. The logic of Trace’s actions—killing debtors to collect debts—is questioned, as it guarantees non-payment. Furthermore, the notion that such violence serves as a deterrent is challenged. Trace’s transformation into a serial killer, rather than a successful crime boss, is pointed out, as is the lieutenant’s futile attempt to advise against his strategy. This perceived weakness in the primary antagonist and the plotline significantly detracts from the episode’s overall impact.

Conversely, the Minbari/Ranger storyline is viewed more favorably, though the reviewer suggests that some elements, such as Delenn meeting an old teacher, feel repetitive. The second-hand nature of Lennier’s training struggles is also noted as a missed opportunity for visual storytelling. However, the banter among the Minbari characters and the casting of Turhan Bey are praised. The ongoing friction between Lochley and Garibaldi is found to be lacking in emotional impact, attributed partly to Tracy Scoggins’ perceived stiffness in conveying emotion.
The episode concludes with a reflection on the recurring narrative trope of "bad guys in Downbelow" on Babylon 5, which the reviewer suggests rarely succeeds. The plot, as a whole, is hampered by casting and writing issues related to the criminal element. The memorable name of Mongo Brownlee, however, is highlighted as a positive aspect, underscoring the impact of distinctive characterizations. The episode sets the stage for future revelations regarding Sheridan and Lochley’s past, promising to delve deeper into their shared history. The final moments also depict the subtle emotional distance that can emerge in relationships when faced with difficult truths.

