The fate of the earth and the taelons may be revealed when three astronauts from the future are discovered in stasis hidden in a government base.
Max tries to stop Alex and Kyle from being buried alive in a cave filled with glowing blue crystals; Isabel is kidnapped by Grant Sorenson possessed by the alien parasite queen; Michael is shot while trying to protect Laurie.
Frank comes to visit Moesha at the dorm and confronts her about her attempts of helping Dorian find his mother. She explains to him that they both have to seriously talk. Later, Frank asks Dorian why he hadn't come to him first before seeing Barbara. Dorian tells him that he didn't want Frank to stop him and that he has his mother to count on now. Dorian visits his mother. When Barbara's sassy sister-in-law, Maya Wilkes, demands that she will not baby-sit for Reecy and Ray-Ray the same night that Barbara is expected to go out for the evening with her husband, Dorian volunteers to baby-sit, but discovers that they are more than a handful. Dorian tells Barbara that he should take his new relationship with her slowly after a few disagreements. Meanwhile, Moesha and Frank discuss the true facts about Frank's affair with Barbara and his rough marriage with Marguerite.
Joan decides to waive her ""three-month rule"" and sleep with Sean, but finds that the results are extremely disappointing. She seeks her friends' advice on how to help Sean improve his performance. Maya, with help from Toni, seeks medical attention after she and Darnell have difficulty conceiving a second child. William keeps having the misfortune of approaching every time Maya is discussing her gynecological situation with one of her friends.
A young woman named Samantha McGee claims that she and Kim were switched at birth, and that she is Nikki's real daughter. Meanwhile, Professor Oglevee enlists the help of Stevie and T to clean up his messy apartment, but they accidentally dispose of the ashes in the urn which is the remains of Stanley's deceased uncle.
Dylan is taken captive and forced to admit that he killed the Mobius leader and overthrew the Mobius government more than 300 years ago.
Richard and John's relationship grows more tense than ever and so they attend couples therapy; Jackson's presence has a profound impact on Elaine; Jackson represent a woman being sued for firing all her male employees.
A major hurricane hits the Hawaiian islands in which Sean is trapped with Jenna in a underground bunker which rising flood waters threaten to drown both of them unless they put aside their personal conflicts and hatred of each other to survive the day and night.
Ray is upset when he finds out that Debra signed up Michael and Geoffery to play fairies in a school play.
Although Robbie is just as nervous as everyone else, his presence in the house during Mary's weekend stay causes a great deal of concern among the Camden's. Matt and Lucy are especially suspicious after Lucy accidently finds a condom in a misplaced wallet. Imagine their surprise when they learn that the provocative prophylactic belongs to Simon--- who just so happens to be spending the evening with his new lady friend, Sasha.
Lawndale High is low on funds and the students and Faculty need to start cutting corners.
Sarge prepares to have a romantic evening with Krider, another former member of the Black Watch. Later, she, Hel and Cleopatra are called to a safe house room where they are greeted by Marla. The team surveys the number of dead bodies filling the room. Among the fallen are some of Marla's guards, her right-hand man Kavilo and Dylan Degaillen, a noted member of the Black Watch who was acting as a double agent for Marla. When Sarge sees Dylan, she has a quick flashback of a firefight, but shrugs it off. Marla plays the holodisc that contains the incident that killed the men and everyone is shocked to see Sarge leading the ambush. Sarge insists she didn't do it, but Marla orders that she be arrested and charged with murder. Marla continues by saying that Sarge's trial shouldn't take long in light of the evidence on the disc. Both Hel and Voice think that Marla's system of justice has become a bit too efficient and the team makes a break for the door. Marla fires a mini laser tracker at Sa
John is honored when he's asked to fill in for the mayor and be the commencement speaker at his old high school, until he discovers why the mayor dropped out.
Bobby's ventriloquist's dummy gets more of Hank's attention than Bobby, but it's Dale who harbors a grudge against the wooden being.
Lois gets a traffic ticket and immediately blames Francis and makes him get the money to her. To do this, Francis stages a stunt for the other cadets' amusement. Malcolm finds evidence that Lois was wrong about the traffic ticket.
When Scully and Doggett are contacted by a man who claims his wife was murdered shortly after giving birth to an alien baby, Scully digs deeper into reports of alien fertilization on humans, and she begins to question her own pregnancy and its conception.
Earth is invaded by super-intelligent flying brains, who sap the Earth's populace of their intelligence. Leela is taken to Nibbler's home planet Eternia, where the Nibblonians explain that only one human is immune to the brains' powers - Fry.