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What is the plot?
Luke and the rest of the CIA team are still dealing with the fallout from Greta's campaign against them, and the episode opens with the pressure tightening around the group as the CIA begins connecting Luke's past with Greta to the current crisis.
Luke, under the influence of a truth serum, reveals the locations of the last two power plants Greta still needs to shut down, which immediately forces the team into emergency response mode so they can try to stop her before she can complete the next phase of her plan.
At the same time, Chips is captured and placed in a tense interrogation, where he is pressed by a skilled questioner trying to break him and extract useful information.
While Chips is being interrogated, Cress is elsewhere handling mechanical work tied to the operation, and the episode cuts between the pressure on Chips and the practical work being done on the other side of the mission.
Chips keeps resisting the interrogation, but the questioning steadily wears him down until he finally gives up the information the others need.
Once the team gets the necessary details from Chips, they determine Greta's next target and learn that she plans to crash a satellite into it, which escalates the mission from sabotage to a potentially catastrophic strike.
After that discovery, the team heads to Cotto Space Force Base in order to commandeer a space shuttle so they can interfere with Greta's plan directly and stop the satellite attack before it lands.
The mission becomes an undercover operation that unexpectedly erupts into chaos, turning the attempt to seize the shuttle into a much larger confrontation than the team anticipated.
The episode ends with the team locked into that escalating emergency, having moved from interrogation and reconnaissance into active intervention against Greta's attack plan.
What is the ending?
In the end, the team stops Greta's satellite attack, and the episode closes with the family's lies, loyalties, and old feelings still tangled together. Chips is exposed as part of the enemy side of the operation, Emma survives the chaos, and the Brunner family's plan leaves Greta alive, but no longer free to continue the same attack in the same way.
The ending unfolds in a chain of fast, tense scenes.
The team realizes Greta's next move is not a ground attack but a satellite strike aimed at a vulnerable power plant. They learn she has manipulated one of the satellites so it can be brought down from orbit, and the danger is immediate: if it falls as planned, it will take out the target below. Barry cannot restore control from where they are, so the team decides they have to get close enough to the satellite to repair it directly. That forces them back to the base, where the plan shifts into a bold theft of a space vehicle.
Luke, Emma, Roo, Aldon, and Barry move in on the base with a new mission: steal a spacecraft and fly up to the satellite. They keep their weapons down because they are trying not to trigger a full confrontation with the base security. Emma cuts through the fence, the team slips inside, and they work their way toward the vehicle they need. Roo takes the controls, Barry prepares the software fix, and the ship lifts off as they head toward the satellite in orbit.
At the same time, the larger emotional conflict comes to a head with Greta and Luke. The episode reveals that Luke's history with Greta has not just complicated the mission; it has also affected how others see him, including the CIA and his family. The team has been balancing the possibility that Luke's past feelings could still influence Greta's choices, and that belief becomes part of the strategy to stop her.
As the operation reaches its most dangerous point, the missile launch and the orbital threat become linked together. Reed tries to hold the larger situation together on the political and military side, while Aldon works to restore satellite control so the Russians can be told to stand down. The problem is that the Russians can see the Americans preparing a launch, so every step risks triggering retaliation. The only way to prevent disaster is to stop the weapon before it leaves American airspace.
Greta makes her final choice in the missile sequence. She goes into the missile's second compartment and manually shuts it down, stopping it before it can leave U.S. airspace. Her action prevents the nuclear strike from spreading into a wider catastrophe. In the process, she survives, and the episode treats that survival as the result of the specific conditions inside the missile and the foam used earlier in the operation.
Inside the silo, Emma gets separated from Chips as the final danger closes in. Chips is revealed to be the hidden threat behind the chaos, and when the blast doors shut and the heat builds, he is trapped. Emma gets into the heat-proof chamber, but Chips cannot escape in time. He is burned to death by the flames of the missile system he helped set in motion.
After the immediate danger passes, Emma confronts Greta. Emma had promised to arrest her for helping Dante, but Greta's action in stopping the missile changes the outcome. Emma lets her go, treating Greta's decision as a real act of redemption.
The episode then explains that Luke, Tally, and Dr. Pfeffer had helped stage the Brunners' breakup as part of the larger plan. They wanted Greta to believe there was still a chance of getting back with Luke, because they thought that hope might be enough to push her against Dante and back toward helping stop the larger threat. That manipulation is part of the final emotional reveal, and it shows how the family used personal pain as a tactical weapon.
As for the fates of the main characters at the end of the episode: Luke survives and remains tied to both the mission and his damaged past with Greta; Emma survives after making it into safety; Greta survives and is allowed to walk away after helping stop the attack; Chips dies in the missile chamber; Roo survives after piloting the spacecraft; Barry survives after helping with the satellite software; Aldon survives after helping with the satellite side of the operation; Reed survives after trying to manage the larger political fallout; and Tally remains part of the emotional fallout around Luke's past and the family's deception.
Is there a post-credit scene?
I could not verify a post-credit scene for FUBAR Season 2, Episode 4, "Astro-Not," from the available results. The sources I found summarize the episode's main action, but none specifically mention an end-credits or post-credits scene.
What I can say from the episode listings and summaries is that "Astro-Not" focuses on an interrogation thread involving Chips, mechanical work involving Cress, and an undercover operation that goes sideways. If there were a post-credit scene, it was not identified in the sources available here.
If you want, I can also help check whether this episode is known for any mid-credits tag, stinger, or setup for the next episode.
What happens to Luke and Greta’s relationship in Episode 4, and how does it affect the mission?
What is Chips’s role in the episode, and how does his conflict with the interrogation expert play out?
What stealth mission does the team carry out in “Astro-Not,” and what goes wrong during it?
How does Greta use truth serum on Luke, and what information does she try to extract from him?
Who is Dante Cress in Episode 4, and what specific action does he take against Felipe?
Is this family friendly?
No--this episode is not especially family friendly. It is part of a TV-MA Netflix action-comedy series, which indicates mature content rather than material aimed at children.
Potentially objectionable or upsetting elements may include: - Violence and peril tied to espionage and interrogation scenes. - Intense threatening situations during a tense interrogation, which may be stressful for sensitive viewers. - Adult language and mature humor, consistent with the series' TV-MA rating. - Sexual references or adult relationship material, since the series centers on messy adult family/romantic dynamics in a spy setting.
For children or very sensitive viewers, this episode is best treated as adult-oriented rather than family viewing.