The episode opens two years after the alien mothership crash-landed and fell dormant on Earth. Trevante Cole is reluctantly brought out by the World Defense Council (WDC) to give a public speech designed to reassure the world that the alien threat is over. During the speech, Trevante is distracted by persistent visions and headaches, and he suddenly notices Jamila Hudson in the crowd shouting for help. Jamila is still grieving the death of her friend Caspar Morrow and believes Trevante holds answers about what really happened to Caspar and the mothership. Trevante, however, is hesitant to engage, fearing that anyone close to him tends to die mysteriously.

Jamila approaches Trevante after the speech and hands him Caspar's EEG readout taken at the time of Caspar's death. This triggers a clearer vision for Trevante, revealing that the mothership contained a new kind of alien entity. He also hears a distinctive sound he associates with an impending invasion--the same sound he heard during his military service overseas. Trevante becomes convinced that a second alien invasion is imminent, but when he tries to warn the WDC general, his claims are dismissed as PTSD-induced delusions. The general orders him to remain silent, effectively shutting down his warnings.

Frustrated and desperate, Trevante decides to go rogue. He knocks out two soldiers who try to stop him, demonstrating his combat skills and determination. Jamila insists on accompanying him, hoping to find closure about Caspar and uncover the truth behind the new alien threat. Together, they set out on a journey to meet experts who might shed light on the aliens' intentions and the looming invasion. Their partnership marks a significant shift in the narrative, as they must navigate both the alien threat and the increasingly paranoid government forces.

As Trevante and Jamila leave the WDC facility, alarms begin to sound and lights flicker, suggesting that something unusual is happening--possibly linked to Dvonte, a character who has developed alien-related powers. The episode hints at the presence of multiple alien portals scattered across Earth, which could serve as gateways to the mothership. The WDC has been monitoring these portals but remains unaware or unwilling to acknowledge the full scope of the threat.

Meanwhile, other characters from previous seasons are shown living their lives, seemingly unaware of the impending danger. Jamila's partner Jan is supportive and understanding of her grief and past trauma, highlighting Jamila's emotional state as she embarks on this perilous mission. The episode ends with Trevante and Jamila heading toward an uncertain future, determined to stop the second invasion before it begins, while the rest of humanity remains blissfully ignorant of the new alien threat closing in.

At the end of Invasion Season 3, Episode 1, titled "The Ones We Leave Behind," Trevante and Jamila set out on a secretive journey to uncover the truth about a new alien threat, as the world remains unaware that the invasion is far from over. Trevante goes rogue after failing to convince authorities of the impending danger, and Jamila joins him, seeking closure for her lost friend Casper. The episode closes with the ominous indication that the aliens are preparing to return sooner than expected, setting the stage for renewed conflict.

The episode begins with the World Defense Council (WDC) attempting to contact Trevante, but the signal is dead, and Casper's vitals spike in a medical facility, signaling ongoing alien-related crises. The narrative then fast-forwards two years after the alien mothership crashed on Earth. Trevante and Casper are publicly celebrated as heroes who sacrificed themselves for humanity, with President J delivering a speech about unity in a new global order during an event called Mday.

Meanwhile, the suburban family of Steven watches the news, unaware that the alien threat is still active. Steven encounters an alien being who stabs him and then returns his dog to the yard with a sinister smile, revealing the hidden danger lurking beneath the surface of apparent peace.

The story shifts to Trevante, who has gone rogue because he cannot convince anyone about the new alien threat. He reunites with Jamila, who is still grieving Casper's death. Jamila decides to join Trevante on his quest to find answers and prevent a second invasion. Their partnership is tense but driven by a shared urgency to uncover the truth.

Trevante and Jamila travel to meet experts who might shed light on the alien threat, navigating both the alien menace and increasingly paranoid government forces. Trevante reveals to Jamila that he has recovered some memories and warns of a new alien presence, but military officials dismiss his claims as PTSD.

As they prepare to leave, alarms and flickering lights suggest that something is stirring--possibly linked to Dvonte, a character who has developed alien-related powers. The episode ends with a sense of foreboding as the aliens' return seems imminent, and the fragile peace of the past two years is on the verge of collapse.

Regarding the main characters' fates at the episode's end:

• Trevante is alive, determined, and on a rogue mission to stop the new alien threat, having distanced himself from official channels.
• Jamila is alive and emotionally committed to helping Trevante, motivated by her grief over Casper.
• Casper is not present in this episode's timeline, presumed dead or incapacitated, but his legacy influences the actions of Trevante and Jamila.
• Steven is attacked by an alien, indicating he may be in grave danger or possibly transformed.
• Other characters like Mitsuki and Kapoor are aware of the looming threat but are not central to the episode's climax.

The episode closes with the world unaware of the impending danger, while Trevante and Jamila's journey signals the beginning of a new chapter in the conflict between humans and aliens.

In "Invasion" Season 3, Episode 1, titled "The Ones We Leave Behind," there is no specific mention of a post-credit scene in the available reviews and recaps. However, the episode does end with a cliffhanger that sets the stage for future events.

The episode begins with a time jump, two years after the alien mothership crashed on Earth. It opens with a family watching a commemoration of M-Day, the day the mothership fell, on TV. Trevante Cole and Caspar Morrow are hailed as heroes for their roles in saving the world. Meanwhile, a family dog named Armstrong disappears in the woods, and the father, Steven, goes to look for him. He is attacked by an alien, setting a ominous tone for the episode.

Later, Trevante Cole is found alive in his space suit at Portal Site 11 in the Atlantic Ocean, which is a significant plot twist. The episode ends with Trevante's return causing confusion and raising questions about his past and how he survived. Jamila, who had been grieving Caspar's apparent death, is pulled back into the conflict. The final scenes suggest that the aliens are still present and waiting, hinting at a larger threat to come.

The absence of a post-credit scene is not explicitly mentioned, but the episode's conclusion effectively sets up the anticipation for what is to come in the rest of the season.

After the mission to destroy the alien mothership, Trevante goes rogue because he cannot convince others about the new alien threat. He partners with Jamila, who is still grieving Caspar's death, to seek closure and answers. They set out to meet experts who might explain the alien threat and try to stop a second invasion, facing both alien dangers and increasing government paranoia.

Trevante's unexpected return after being missing for two years is a major plot point. He is found alive in his space suit near an alien portal, confused about how he got back. His return triggers a reunion with Jamila and reveals a new alien presence. Trevante tries to warn the military about the new threat but is dismissed as suffering from PTSD, leading him to go rogue.

Jamila, still mourning Caspar's death, decides to accompany Trevante on his quest to understand the new alien threat. Their partnership is emotionally charged, with Jamila seeking closure and Trevante struggling with memory loss. Their reunion is significant, showing mutual support and a shared mission to confront the looming danger.

The episode reveals that the aliens have multiple portals on Earth, not just the mothership crash site, which could be used for a second invasion. Trevante's visions and recovered memories indicate a new alien entity or threat emerging, which the military initially ignores. This sets the stage for renewed conflict and tension.

The military and government officials are skeptical of Trevante's warnings, attributing his claims to PTSD. They do not take immediate action, which frustrates Trevante and leads to confrontations with soldiers. Meanwhile, government forces are becoming increasingly paranoid and secretive, complicating efforts to address the alien threat.

Invasion, Season 3, Episode 1: "The Ones We Leave Behind" is not considered family friendly and is rated TV-MA, indicating it is intended for mature audiences only. The series as a whole features moderate violence and gore, moderate profanity, mild sexual content, and moderate frightening or intense scenes. While detailed scene-by-scene breakdowns for this specific episode are not available in the provided sources, the following general aspects--based on the show's established content patterns and parental guidance--are likely to be present and could be upsetting or objectionable for children or sensitive viewers:

• Violence and Gore: Expect scenes with physical confrontations, blood, and fighting. Characters may be shown in peril, with tense, chaotic sequences that could be distressing, especially in dark or claustrophobic settings where the threat feels immediate and visceral.
• Profanity: The dialogue includes strong language such as "fuck" and "shit," as well as other crude terms and occasional racial slurs, which are consistent with the show's previous seasons.
• Sexual Content: While not graphic, there are moments where characters are shown in bras and panties, with brief toplessness (from the back or side) during intimate scenes or while changing. These scenes are not prolonged but are present and could be uncomfortable for some viewers.
• Frightening/Intense Scenes: The episode likely maintains the series' signature ominous atmosphere, with many scenes taking place at night or in shadowy interiors. Creepy sound design and limited visibility can heighten tension and anxiety, potentially upsetting younger or more sensitive audiences.
• Alcohol, Drugs, and Smoking: References to substance use (such as a meth lab) may occur, though these are generally mild and not a central focus.

In summary, "The Ones We Leave Behind" contains material that is inappropriate for children and may be disturbing for sensitive viewers, including moderate violence, strong language, mild sexual content, and intense, frightening sequences. Parents and guardians should exercise caution and consider the TV-MA rating before allowing younger audiences to watch.