The episode begins in 1916, during World War I, where a group of British soldiers is ambushed by Sontarans. The Sontarans, a race of warrior aliens, are shown to be ruthless and efficient, capturing the soldiers and preparing to use them in their war efforts. The scene is tense, filled with the sounds of gunfire and the chaos of battle, as the Sontarans assert their dominance.

Meanwhile, the Doctor, Yaz, and Dan are in the TARDIS, which is experiencing turbulence due to the Flux. The Doctor is trying to stabilize the ship, but the Flux is causing disruptions in time and space. They are suddenly pulled out of the TARDIS and find themselves in the midst of the Sontaran conflict. The Doctor quickly assesses the situation, realizing they need to intervene to prevent the Sontarans from altering history.

The Doctor, Yaz, and Dan split up to gather information and find a way to stop the Sontarans. The Doctor encounters a Sontaran commander, who is confident in their plan to conquer Earth. The Doctor uses her wit and intelligence to engage the Sontaran in conversation, trying to buy time and gather intel on their strategy. The Sontaran, however, is dismissive and underestimates the Doctor, leading to a tense standoff.

Yaz and Dan, meanwhile, are captured by the Sontarans and taken to their base. They witness the Sontarans' brutal methods as they interrogate the British soldiers. Yaz, determined to escape, uses her training and resourcefulness to devise a plan. She and Dan manage to free themselves during a moment of chaos, using the confusion to their advantage.

Back at the Sontaran base, the Doctor discovers that the Sontarans are using a time manipulation device to ensure their victory in the war. She realizes that if they succeed, it could have catastrophic consequences for the timeline. The Doctor formulates a plan to sabotage the device, but she knows she needs her companions to help execute it.

As Yaz and Dan make their way through the base, they encounter a group of soldiers who are also trying to escape. They join forces, and together they create a diversion to distract the Sontarans. The tension builds as they navigate through the base, avoiding patrols and using stealth to reach the control room.

The Doctor arrives at the control room just as the Sontarans are about to activate the time manipulation device. A confrontation ensues, with the Doctor using her sonic screwdriver to disrupt the device. The Sontarans retaliate, and a fierce battle breaks out. The Doctor, Yaz, and Dan work together, showcasing their teamwork and determination to thwart the Sontarans' plans.

In the midst of the chaos, the Doctor confronts the Sontaran commander, engaging in a battle of wits and strategy. The Doctor's quick thinking allows her to outmaneuver the Sontarans, leading to their defeat. The time manipulation device is destroyed, and the Sontarans are forced to retreat.

As the dust settles, the Doctor, Yaz, and Dan regroup with the soldiers they helped rescue. There is a moment of relief and camaraderie as they celebrate their victory, but the Doctor remains concerned about the implications of the Flux and the ongoing threat it poses. She knows that their fight is far from over.

The episode concludes with the Doctor, Yaz, and Dan back in the TARDIS, reflecting on their adventure. The Doctor is determined to uncover the mysteries of the Flux and what it means for the universe. The TARDIS dematerializes, leaving the battlefield behind as they prepare for their next journey.

At the end of "War of the Sontarans," the Doctor, Yaz, and Dan manage to thwart the Sontaran invasion of Earth during the Crimean War. The Doctor uses a clever plan involving the Sontarans' own technology against them, leading to their defeat. The episode concludes with the Doctor realizing that the Flux is still a looming threat, and she must continue to confront the challenges it presents. The Doctor, Yaz, and Dan are left with a sense of urgency as they prepare to face the next part of their journey.

As the episode draws to a close, the scene shifts to the battlefield where the Sontarans are engaged in combat with the British forces. The Doctor, portrayed with a fierce determination, devises a plan to exploit the Sontarans' overconfidence. She instructs Yaz and Dan to create a diversion, allowing her to infiltrate the Sontaran camp. The tension is palpable as the Doctor navigates through the chaos of war, her heart racing with the weight of her responsibility to save humanity.

In a pivotal moment, the Doctor confronts the Sontaran leader, General Logan, and uses a captured Sontaran device to turn the tide of battle. The device, initially intended for destruction, is repurposed to create a temporal anomaly that traps the Sontarans in a time loop. The visual effects are striking as the Sontarans, caught in their own trap, are seen repeating their actions in a disorienting cycle. The Doctor's quick thinking and resourcefulness shine through, showcasing her ability to adapt under pressure.

Meanwhile, Yaz and Dan are engaged in their own struggles on the battlefield. Dan, motivated by his desire to protect those around him, fights valiantly alongside the British soldiers. His bravery is evident as he faces the Sontarans head-on, embodying the spirit of a hero. Yaz, equally determined, supports Dan and helps coordinate their efforts, demonstrating her growth as a companion and her commitment to the Doctor's mission.

As the Sontarans are defeated, the Doctor, Yaz, and Dan regroup, their expressions a mix of relief and concern. The Doctor's brow furrows as she contemplates the implications of their victory. She realizes that while they have won this battle, the Flux remains an unresolved threat, looming ominously in the background. The emotional weight of this realization hangs heavy in the air, as the Doctor understands that their journey is far from over.

In the final moments, the trio stands together, united yet aware of the challenges ahead. The Doctor's resolve is palpable as she reassures Yaz and Dan, emphasizing the importance of their partnership. They share a moment of camaraderie, but the underlying tension of the Flux serves as a reminder of the dangers that still lie ahead. The episode concludes with a sense of urgency, setting the stage for the next chapter in their adventure, as they prepare to face whatever comes next in their quest against the Flux.

In "War of the Sontarans," there is no post-credit scene. The episode concludes without any additional scenes or teasers after the credits roll. The focus remains on the main narrative and the resolution of the episode's events, leaving viewers with the impact of the story rather than a cliffhanger or additional content.

In 'War of the Sontarans', the Doctor, portrayed by Jodie Whittaker, takes on a central role as she navigates the chaos of the Sontaran invasion during the Crimean War. She is determined to protect humanity and stop the Sontarans from altering history. Her internal conflict is evident as she grapples with the moral implications of war and the consequences of her actions.

Dan Lewis, played by John Bishop, becomes a key player in the episode as he finds himself caught in the midst of the Sontaran invasion. His bravery and quick thinking are highlighted when he attempts to rally the soldiers and civilians against the Sontarans. Dan's emotional state fluctuates between fear and determination, showcasing his growth as he steps up to face the alien threat.

The Sontarans' plan to alter history by using the Crimean War as a battleground is significant as it reflects their desire for conquest and dominance. Their strategy involves manipulating key events to ensure their victory, which poses a direct threat to the timeline. This plot element raises the stakes for the Doctor and her companions, as they must not only fight against the Sontarans but also protect the integrity of history.

In 'War of the Sontarans', the relationship between the Doctor and her companions, particularly Yaz and Dan, is explored through their shared experiences in the face of danger. The Doctor's leadership is tested as she relies on their support, while Yaz's loyalty and Dan's emerging heroism create a dynamic that emphasizes teamwork. The emotional bonds are deepened as they confront the horrors of war together.

The Doctor faces numerous challenges when confronting the Sontarans, including their relentless military tactics and their underestimation of human resilience. She must devise clever strategies to outsmart them while dealing with the emotional weight of the lives at stake. The tension escalates as she navigates the battlefield, showcasing her resourcefulness and determination to protect humanity against overwhelming odds.

"Doctor Who: Flux" episode 2, "War of the Sontarans," contains several elements that may be considered objectionable or upsetting for children or sensitive viewers. Here are some aspects to be aware of:

1. Violence and War Themes: The episode features scenes of battle and conflict, including the Sontarans engaging in warfare, which may be intense for younger viewers.

2. Death and Destruction: There are moments depicting the consequences of war, including the loss of life and destruction of environments, which can be emotionally heavy.

3. Tension and Fear: The presence of the Sontarans, known for their menacing demeanor, can create a sense of fear and anxiety, particularly in scenes where they confront characters.

4. Mature Themes: The episode explores themes of loyalty, sacrifice, and the moral complexities of war, which may be difficult for younger audiences to fully grasp.

5. Graphic Imagery: Some scenes may include graphic representations of injuries or the aftermath of battles, which could be unsettling.

These elements contribute to the overall tone of the episode, which balances adventure with darker themes typical of the "Doctor Who" series. Viewer discretion is advised for younger audiences or those sensitive to such content.